A tent is of the shape of a right circular cylinder upt a height of 3 metres and then becomes a right circular cone with a maximum height of 13.5 metres above the ground. Calculate the cost of paintingthe inner side of the tent at the rate of Rs. 2 per square metre, if the radius of the base is 14 metres.

Explanation

since radius of the base of tent `r=14m`

and `h=3m`

so curved or inner surface area `= 2pirh`

`=2xxpixx14xx3`

`=264cm^2`

now for upper cone,

`r=14m`

`h=10.5m`

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