CBSE Class 9 Maths Surface Areas and Volumes
- What is the volume of a right circular cylinder whose base area is 606cm² and whose height is 2m
- The radius of a right circular cylinder with curved surface area of 440 cm2 and an altitude of 5 cm is
the radius of sphere is 2r, then its volume will be?
- a cylindrical vessel filled with water has internal diameter 7.8cm and height 28cm. it's entire water is put in a rectangular tube whose base is a square of side 26cm.find the height of water in tube?
- find the diameter of a cylinder whose height is 5cm and numerical value of volume is equal to numerical alue of curved surface area
- A hollow cylindrical tube, open at both ends is made of iron 1 cm thick. If the external diameter is 14 cm and the length of tube is 70 cm, Find the cost of painting its inner surface at the rate of Rs. 4 per cm2.
- The diameter of a roller 1 m long is 56 cm. If it takes 200 revolutions to level a playground, find the cost of levelling the playground at the rate of 50 paisa per m2.
- Find the lateral surface area (curved surface area) of a hollow cylinder open at the ends of length is 14 cm, the external diameter is 10 cm and the thickness is 2 cm.
- If 1 m2 of sheet costs Rs. 400. Find the cost of sheet required to make a closed cylindrical tank of height 1.4 m and base diameter 210 cm.
- The inner radius of a circular well is 2.1 m and its depth is 21 m. Find the cost of plastering the inner surface of a circular well at the rate of Rs. 40 per m2
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