Recent questions in 8th-maths

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Below are the drawings of cross sections of two different pipes used to fill swimming pools. Figure A is a combination of 2 pipes each having a radius of 8 cm. Figure B is a pipe having a radius of 15 cm. If the force of the flow of water coming out of the pipes is the same in both the cases, which will fill the swimming pool faster?

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

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A swimming pool is 200 m by 50 m and has an average depth of 2 m. By the end of a summer day, the water level drops by 2 cm. How many cubic metres of water is lost on the

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

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A housing society consisting of 5,500 people needs 100 L of water per person per day. The cylindrical supply tank is 7 m high and has a diameter 10 m. For how many days will the water in the tank last for the

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

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Metallic discs of radius 0.75 cm and thickness 0.2 cm are melted to obtain 508.68 `cm^3` of metal. Find the number of discs melted (use π =

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

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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 17, 2022 in 8th-maths by nishit (1.8k 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 17, 2022 in 8th-maths by sumit (1.6k 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 17, 2022 in 8th-maths by vaibhav (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 17, 2022 in 8th-maths by Arun (1.7k 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 17, 2022 in 8th-maths by Arun (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 17, 2022 in 8th-maths by purvi (1.8k points)

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The actual width of a store room is 280 cm. If the scale chosen to make its drawing is 1:7, then the width of the room in the drawing will be 40

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

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Complete the table given below:

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

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Complete the table given below:

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

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How many faces does each of the following solids, have? (a) Tetrahedron (b) Hexahedron (c) Octagonal Pyramid (d)

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

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Draw a prism with its base as regular hexagon with one of its face facing you. Now draw the top view, front view and side view of this

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

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How many vertices does each of the following solids have? (a) Cone (b) Cylinder (c) Sphere (d) Octagonal Pyramid (e) Tetrahedron (f) Hexagonal

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

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How many edges does each of following solids have? (a) Cone (b) Cylinder (c) Sphere (d) Octagonal Pyramid (e) Hexagonal Prism (f)

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

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Look at the shapes given below and state which of these are polyhedra using Euler’s formula.

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

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Look at the shapes given below and state which of these are polyhedra using Euler’s formula.

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

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Look at the shapes given below and state which of these are polyhedra using Euler’s formula.

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

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