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Questions and Answers

In triangle ABC, points D and E are on sides BC and AB respectively, such that angle ACB = angle DEB. If AB = 12 cm, BE = 5 cm, and BD:CD = 1:2, what is the length of BC?

  • 8√3 cm
  • 5√5 cm
  • 6√5 cm (correct)
  • 6√3 cm

A well with an inner radius of 3 m is dug 6 m deep. The soil taken out is spread evenly around it to form an embankment with a width of 2 m. What is the height of the embankment?

  • 3 3/4 m
  • 4 1/2 m
  • 3 3/8 m (correct)
  • 4 1/4 m

If $cosec \theta = \frac{13}{12}$, then what is the value of $\frac{sin \theta (1 - tan \theta)}{tan \theta (1 + cosec \theta)}$?

  • 35/108
  • 35/234 (correct)
  • 25/156
  • 25/78

In 2020, the ratio of incomes of A and B was 5:4. In 2020 and 2021, their individual income ratios were 4:5 and 2:3, respectively. If the total income of A and B in 2021 was Rs. 7,05,600, what was B's income in 2021?

<p>Rs. 3,45,600 (A)</p> Signup and view all the answers

If $x = 32.5$, $y = 34.6$, and $z = 30.9$, then the value of $x^3 + y^3 + z^3 - 3xyz$ is $0.98k$. What is the value of k?

<p>1033 (C)</p> Signup and view all the answers

The base of a right prism is a triangle with sides 8 cm, 15 cm, and 17 cm, and its lateral surface area is 480 cm². What is the volume of the prism?

<p>720 cm³ (D)</p> Signup and view all the answers

What is the value of the expression $11.4 + 22.5 \times 6/7 - 33.5 \div 9$?

<p>0.412 (A)</p> Signup and view all the answers

In a class of 45 students, 33 1/3% are boys, and the rest are girls. The average score of the girls in Science is 66 2/3% more than that of the boys. If the average score of all students is 78, what is the average score of the girls?

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A car travels at 75 km/hr. The driver sees a bus 80 m ahead moving in the same direction. After 15 seconds, the bus is 40 m behind the car. What is the speed of the bus?

<p>46.2 km/hr (A)</p> Signup and view all the answers

Three numbers are in the ratio 1/2 : 2/3 : 3/4. If the difference between the largest and smallest number is 33, what is the HCF of the three numbers?

<p>11 (D)</p> Signup and view all the answers

Simplify the expression: $(\tan \theta + \cot \theta) (\sec \theta + \tan \theta) (1 - \sin \theta)$ where $0° < \theta < 90°$.

<p>cosec θ (D)</p> Signup and view all the answers

In a medical transaction, 17 times the cost price equals 8 times the sum of the cost price and selling price. What is the gain or loss percentage?

<p>gain 12.5% (B)</p> Signup and view all the answers

P alone can complete a work in 18 days. P worked for 5 days, then Q joined him and together they completed the rest of the work in 6 2/5 days. How many days will Q take to complete 66 2/3% of the same work?

<p>3 (A)</p> Signup and view all the answers

Rs. 5,000 is divided into two parts. The simple interest on the first part for $4\frac{1}{2}$ years at $6\frac{2}{3}%$ p.a. is double the simple interest on the second part for $2\frac{1}{4}$ years at 4% p.a. Find the ratio of the second part to the first part.

<p>14:11 (C)</p> Signup and view all the answers

If $847 \times 385 \times 675 \times 3025 = 3^a \times 5^b \times 7^c \times 11^d$, what is the value of ab - cd?

<p>5 (C)</p> Signup and view all the answers

A circle is inscribed in triangle PQR, touching the sides QR, PR, and PQ at points S, U, and T, respectively. Given PQ = (QR + 5) cm, PQ = (PR + 2) cm, and the perimeter of triangle PQR is 32 cm. What is the length of PR?

<p>11 cm (A)</p> Signup and view all the answers

What is $\frac{1 + cos \theta - sin^2 \theta}{sin \theta (1 + cos \theta)} \times \frac{\sqrt{sec^2 \theta + cosec^2 \theta}}{tan \theta + cot \theta}$ equal to, given $0° < \theta < 90°$?

<p>cot θ (B)</p> Signup and view all the answers

An article was sold for Rs. 716 after a discount of 10.5%. If a discount of 6.5% is given instead, for how much should the article be sold?

<p>Rs. 748 (C)</p> Signup and view all the answers

If the 10-digit number 75462A97B6 is divisible by 72, then what is the value of $\sqrt{8A - 4B}$?

<p>√28 (C)</p> Signup and view all the answers

A starts a business with Rs. 54,000. B and C join after 4 and 6 months, respectively. At the end of the year, the profit is divided among the three in the ratio 1:4:5. What is the sum of the capitals invested by B and C?

<p>Rs. 8,64,000 (A)</p> Signup and view all the answers

Flashcards

Similar Triangles

Points D and E are on sides BC and AB of triangle ABC, respectively. Angle ACB equals angle DEB. Given AB=12cm, BE=5cm, BD:CD = 1:2

Embankment Height Calculation

Soil is spread evenly around a well to form an embankment. Calculate the height of the embankment.

Trigonometric Simplification

Apply trigonometric identities to simplify the given expression involving sine, cosine, and tangent.

Income Ratio Problem

Find B's income in 2021, given the ratio of incomes in 2020 and individual income ratios in 2020 and 2021. The total income of A and B in 2021 is known.

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Algebraic Identity Application

x=32.5, y=34.6, z=30.9, find the value of x³ + y³ + z³ - 3xyz using the condition its equal to 0.98k, and then find the value of k.

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Right Prism Volume

A right prism's base is a triangle with sides 8cm, 15cm, and 17cm. Lateral surface area is 480 sq cm. Find the volume.

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Decimal Arithmetic

Simplify a numerical expression involving addition, division, and subtraction with decimal numbers.

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Weighted Averages

In a class of 45 students, 33 1/3% are boys, rest are girls. The average score of girls is 66 2/3% more than boys. Combined average is 78. Find the average score of girls.

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Relative Speed

Calculate the speed of a bus relative to a car, given the car's speed, and their relative positions at two different times.

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Ratio and HCF

Three numbers are in ratio 1/2:2/3:3/4 and the difference between the greatest and smallest is 33, Find the HCF.

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Trigonometric Expression Simplification

Simplify the expression (tan θ + cot θ)(sec θ + tan θ)(1 - sin θ) knowing 0° < θ < 90°.

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Profit Loss

Given that 17 times the cost price equals 8 times the sum of the cost price and selling price, find the gain or loss percentage

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Combined Work Problem

P finishes a work in 18 days. After P works for 5 days, Q joins. They together complete the rest in 6 13/66 days, find how long Q takes alone to do 66 2/3% of the work.

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Simple Interest Ratio

Rs. 5000 is divided into two parts such that the simple interest on the first for 4.5 years at 6 2/3% p.a. is double the simple interest on the second part for 2.5 years at 4% p.a. Find the ratio of second to first part.

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Prime Factorization Equation

If 847 x 385 x 675 x 3025 = 3^a x 5^b x 7^c x 11^d find the value of ab-cd

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Incircle Tangent Property

A circle inscribed in triangle PQR touches sides QR, PR, PQ at S, U, T. PQ = QR+5, PQ=PR+2, Perimeter of triangle equals 32. Find PR

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