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Ratio of area of a circle to the area of a square whose side equals radius of circle is 1 :

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

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Mukesh walks around a circular track of radius 14 m with a speed of 4 km/hr. If he takes 20 rounds of the track, for how long does he

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

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The areas of two circles are in the ratio 49:64. Find the ratio of their

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

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Find the perimeter of the given figure.

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

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A boy is cycling such that the wheels of the cycle are making 140 revolutions per hour. If the diameter of the wheel is 60 cm, calculate the speed in km/h with which the boy is

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

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Find the area of the shaded portion in the following

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

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

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How many cubic metres of earth must be dug to construct a well 7 m deep and of diameter 2.8

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

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The radius and height of a cylinder are in the ratio 3:2 and its volume is 19,404 `cm^3`. Find its radius and

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

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The thickness of a hollow metallic cylinder is 2 cm. It is 70 cm long with outer radius of 14 cm. Find the volume of the metal used in making the cylinder, assuming that it is open at both the ends. Also find its weight if the metal weighs 8 g per

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

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A wooden box (including the lid) has external dimensions 40 cm by 34 cm by 30 cm. If the wood is 1 cm thick, how many `cm^3` of wood is used in

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

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Very small numbers can be expressed in standard form using positive

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

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Simplify

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

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For a fixed base, if the exponent decreases by 1, the number

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

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If x be any integer different from zero and m, n be any integers, then `(x^m)^n` is equal

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

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Write 0.000005678 in the standard

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

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While studying her family’s history. Shikha discovers records of ancestors 12 generations back. She wonders how many ancestors she has had in the past 12 generations. She starts to make a diagram to help her figure this out. The diagram soon becomes very complex. (a) Make a table and a graph showing the number of ancestors in each of the 12

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

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The number of teeth and the age of a person

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

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(i) The quantity of rice and its cost. (ii) The height of a tree and the number of years. (iii) Increase in cost and number of shirts that can be purchased if the budget remains the same. (iv) Area of land and its cost. (v) Sales Tax and the amount of the

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

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Find the values of x and y if a and b are in inverse proportion: a. 12 x 8 b. 30 5

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

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