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A solid metallic sphere of diameter 21 c...

A solid metallic sphere of diameter 21 cm is melted and recast into a number of smaller cones, each of diameter 3.5 cm and height 3 cm. Find the number of cones so formed.

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504
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RS AGGARWAL-VOLUME AND SURFACE AREAS OF SOLIDS-Exercise 17B
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  16. The rain water from a roof 22 m xx 20 m drains into a cylindrical vess...

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  17. A solid right circular cone of height 60 cm and radius 30 cm is dropp...

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  18. Water is flowing through a cylindrical pipe of internal diameter 2 cm,...

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  19. Water is flowing at the rate of 6km/hr through a pipe of diameter 14 c...

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  20. Water in a canal 5.4 m wide and 1.8 m deep is following with a speed ...

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