1.

The base area of a cone is 38.5 cm . Its volume is 77 cm. Find its height

Answer»

Base area =πr² = 38.5 cm²

Volume = (1/3)πr²×h = 77 cm³

so,

77 = (1/3)×38.5×h

⇒h = (77×3)/38.5

= 6 cm



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