Question
The capacity of a cylindrical tank is 246.4 litres. If the height is 4 metres, what is the diameter of the base ?
Answer: Option D
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Volume of the tank = 246.4 litres = 246400 `cm^3`
Let the radius of the base be r cm . Then ,
`(22/7 xx r^2 xx 400)` = 246400
`hArr r^2 = ((246400 xx 7)/(22 xx 400))`
`hArr r^2 = 196` `hArr r = 14`
`:.` Diameer of the base = 2r = 28 cm.
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