Recent questions tagged chapter11

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Most of the sailboats have two sails, the jib and the mainsail. Assume that the sails are triangles. Find the total area of each sail of the sail boats to the nearest tenth.

asked Jan 18, 2022 in 8th-maths by Simran (1.8k points)

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The area of a trapezium with equal non-parallel sides is 168 `m^2`. If the lengths of the parallel sides are 36 m and 20 m, find the length of the non-parallel

asked Jan 18, 2022 in 8th-maths by nikhil (1.8k 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 18, 2022 in 8th-maths by nikhil (1.8k points)

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

asked Jan 18, 2022 in 8th-maths by nikhil (1.8k points)

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There is a circular pond and a footpath runs along its boundary. A person walks around it, exactly once keeping close to the edge. If his step is 66 cm long and he takes exactly 400 steps to go around the pond, find the diameter of the

asked Jan 18, 2022 in 8th-maths by krutika (1.7k points)

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A running track has 2 semicircular ends of radius 63 m and two straight lengths. The perimeter of the track is 1000 m. Find each straight

asked Jan 18, 2022 in 8th-maths by sumit (1.6k points)

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Find the perimeter of the given figure.

asked Jan 18, 2022 in 8th-maths by Simran (1.8k points)

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A bicycle wheel makes 500 revolutions in moving 1 km. Find the diameter of the

asked Jan 18, 2022 in 8th-maths by yogita (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 18, 2022 in 8th-maths by krutika (1.7k points)

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Find the length of the largest pole that can be placed in a room of dimensions `12 m xx 4 m xx 3 m`. Find the area of the following fields. All dimensions are in

asked Jan 18, 2022 in 8th-maths by vaibhav (1.7k points)

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Find the area of the shaded portion in the following

asked Jan 18, 2022 in 8th-maths by yogita (1.8k points)

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Find the area of the shaded portion in the following

asked Jan 18, 2022 in 8th-maths by purvi (1.8k points)

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Find the volume of each of the given figure if volume = base area `xx`height.

asked Jan 18, 2022 in 8th-maths by nishit (1.8k points)

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A cube of side 5 cm is cut into as many 1 cm cubes as possible. What is the ratio of the surface area of the original cube to that of the sum of the surface areas of the smaller

asked Jan 18, 2022 in 8th-maths by Simran (1.8k points)

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A square sheet of paper is converted into a cylinder by rolling it along its side. What is the ratio of the base radius to the side of the

asked Jan 18, 2022 in 8th-maths by uday (1.6k 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 18, 2022 in 8th-maths by yogita (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 18, 2022 in 8th-maths by krutika (1.7k 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 18, 2022 in 8th-maths by vaibhav (1.7k points)

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Radius of a cylinder is r and the height is h. Find the change in the volume if the (a) height is doubled. (b) height is doubled and the radius is halved. (c) height remains same and the radius is

asked Jan 18, 2022 in 8th-maths by purvi (1.8k points)

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If the length of each edge of a cube is tripled, what will be the change in its

asked Jan 18, 2022 in 8th-maths by Simran (1.8k points)

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