Question
A solid metallic cylinder of base radius 3 cm and height 5 cm is meled to from cones each of height 1 cm and base radius 1 mm . The number of cones is
Answer: Option D
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Volume of cylinder = `(pi xx 3 xx 3 xx 5) cm^3 = 45 cm^3`.
Volume of 1 cone = `(1/3 pi xx 1/10 xx 1/10 xx 1) cm^3 = pi/300 cm^3`
`:.` Number of cones =` ( 45 pi xx 300/pi)` = 13500
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