Recent questions tagged #sub

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The ratio of the radius and height of a cylinder is 2:3. If its volume is 12,936 `cm^3`, find the total surface area of the

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

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External dimensions of a closed wooden box are in the ratio 5:4:3. If the cost of painting its outer surface at the rate of Rs 5 per d`m^2` is Rs 11,750, find the dimensions of the

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

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The capacity of a closed cylindrical vessel of height 1 m is 15.4 L. How many square metres of metal sheet would be needed to make

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

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What will happen to the volume of the cube, if its edge is (a) tripled (b) reduced to

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

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A rectangular sheet of dimensions `25 cm xx 7 cm` is rotated about its longer side. Find the volume and the whole surface area of the solid thus

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

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From a pipe of inner radius 0.75 cm, water flows at the rate of 7 m per second. Find the volume in litres of water delivered by the pipe in 1

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

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Four times the area of the curved surface of a cylinder is equal to 6 times the sum of the areas of its bases. If its height is 12 cm, find its curved surface

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

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A cylindrical tank has a radius of 154 cm. It is filled with water to a height of 3 m. If water to a height of 4.5 m is poured into it, what will be the increase in the volume of water in

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

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The length, breadth and height of a cuboidal reservoir is 7 m, 6 m and 15 m respectively. 8400 L of water is pumped out from the reservoir. Find the fall in the water level in the

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

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How many bricks of size `22 cm xx 10 cm xx 7 cm` are required to construct a wall 11m long, 3.5 m high and 40 cm thick, if the cement and sand used in the construction occupy `(1/10)^(th)` part of the

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

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A rectangular examination hall having seats for 500 candidates has to be built so as to allow 4 cubic metres of air and 0.5 square metres of floor area per candidate. If the length of hall be 25 m, find the height and breadth of the

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

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The ratio between the curved surface area and the total surface area of a right circular cylinder is 1:2. Find the ratio between the height and radius of the

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

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A birthday cake has two tiers as shown in the figure below. Find the volume of the cake.

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

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Water flows from a tank with a rectangular base measuring 80 cm by 70 cm into another tank with a square base of side 60 cm. If the water in the first tank is 45 cm deep, how deep will it be in the second

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

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A rectangular sheet of paper is rolled in two different ways to form two different cylinders. Find the volume of cylinders in each case if the sheet measures 44 cm × 33

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

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Plot the points (4, 4), (1, 3), (4, 2) and (7, 3) on a graph paper and connect them with line segments. Name the shape formed by these

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

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Write the coordinates of all the points in the given

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

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The following is a conversion graph of temperature in °Cand °F.Use the graph to answer the following questions.(a) Convert 140 °F to °C.(b) Convert 20 °C to

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

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Following graph shows a comparison of the approximate sale of items manufactured by a company for the first two years of its operation. (i) In which months there was maximum difference inthe sale of items of two

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

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Following graph shows a comparison of the approximate sale of items manufactured by a company for the first two years of its operation. In which year was there more stability in the sale ofitems?(iii) In which month the sale remains the same in both the

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

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