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If the thickness of a pile of 12 cardboard sheets is 45 mm, then the thickness of a pile of 240 sheets is _______

asked Jan 17, 2022 in 8th-maths by yogita (1.8k points)

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If x varies inversely as y and x = 4 when y = 6, then when x = 3 the value of y is

asked Jan 17, 2022 in 8th-maths by sumit (1.6k points)

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If the area occupied by 15 postal stamps is 60 cm2, then the area occupied by 120 such postal stamps will be

asked Jan 17, 2022 in 8th-maths by yogita (1.8k points)

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If 45 persons can complete a work in 20 days, then the time taken by 75 persons will be ______

asked Jan 17, 2022 in 8th-maths by Arun (1.7k points)

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A contractor undertook a contract to complete a part of a stadium in 9 months with a team of 560 persons. Later on, it was required to complete the job in 5 months. How many extra persons should he employ to complete the

asked Jan 17, 2022 in 8th-maths by nikhil (1.8k points)

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A car covers a distance in 40 minutes with an average speed of 60 km/h. What should be the average speed to cover the same distance in 25

asked Jan 17, 2022 in 8th-maths by nikhil (1.8k points)

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From the following table, determine if x and y are in direct proportion or not. x 4 7 10 16 y 24 42 60 96

asked Jan 17, 2022 in 8th-maths by nikhil (1.8k points)

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If a and b vary inversely to each other, then find the values of p, q, r ; x, y, z and l, m, n. a 2 y 6 10 b x 12.5 15 z

asked Jan 17, 2022 in 8th-maths by yogita (1.8k points)

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If a and b vary inversely to each other, then find the values of p, q, r ; x, y, z and l, m, n. a l 9 n 6 b 5 m 25 10

asked Jan 17, 2022 in 8th-maths by sumit (1.6k points)

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At a particular time, the length of the shadow of Qutub Minar whose height is 72 m is 80 m. What will be the height of an electric pole, the length of whose shadow at the same time is 1000

asked Jan 17, 2022 in 8th-maths by Simran (1.8k points)

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Match each of the entries in Column I with the appropriate entry in Column II Column I Column II 1. x and y vary inversely to each other A. x y = Constant 2. Mathematical representation of inverse B. y will increase in proportion variation of quantities p and q 3. Mathematical representation of C. xy = Constant direct variation of quantities m and n 4. When x = 5, y = 2.5 and when D. p ∝ 1 q y = 5, x = 10

asked Jan 17, 2022 in 8th-maths by nikhil (1.8k points)

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A water tank casts a shadow 21 m long. A tree of height 9.5 m casts a shadow 8 m long at the same time. The lengths of the shadows are directly proprotional to their heights. Find the height of the tank

asked Jan 17, 2022 in 8th-maths by nishit (1.8k points)

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Pattern B consists of four tiles like pattern A. Write a proportion involving red dots and blue dots in pattern A and B. Are they in direct proportion? If yes, write the constant of proportion.

asked Jan 17, 2022 in 8th-maths by vaibhav (1.7k points)

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A bowler throws a cricket ball at a speed of 120 km/h. How long does this ball take to travel a distance of 20 metres to reach the

asked Jan 17, 2022 in 8th-maths by Simran (1.8k points)

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The variable x is inversely proportional to y. If x increases by p%, then by what per cent will y

asked Jan 17, 2022 in 8th-maths by krutika (1.7k points)

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Kritika is following this recipe for bread. She realises her sister used most of sugar syrup for her breakfast. Kritika has only `1/6` cup of syrup, so she decides to make a small size of bread. How much of each ingredient shall she use? Bread recipe 1 cup quick cooking oats 2 cups bread flour `1/3` cup sugar syrup 1 tablespoon cooking oil `1 1/3` cups water 3 tablespoons yeast 1 teaspoon

asked Jan 17, 2022 in 8th-maths by krutika (1.7k points)

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160 `m^3` of water is to be used to irrigate a rectangular field whose area is 800 `m^2`. What will be the height of the water level in the

asked Jan 17, 2022 in 8th-maths by nikhil (1.8k points)

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A cube of side 5 cm is painted on all its faces. If it is sliced into 1 cubic centimetre cubes, how many 1 cubic centimetre cubes will have exactly one of their faces

asked Jan 17, 2022 in 8th-maths by vaibhav (1.7k points)

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If the height of a cylinder becomes `1/4` of the original height and the radius is doubled, then which of the following will be

asked Jan 17, 2022 in 8th-maths by Arun (1.7k points)

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If the height of a cylinder becomes `1/4` of the original height and the radius is doubled, then which of the following will be

asked Jan 17, 2022 in 8th-maths by vaibhav (1.7k points)

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