Find the length of cloth used in making a conical pandal of height 100m and base radius 240m, if the cloth is `100pi` m wide.

Explanation

given `h=100m`

`r=240m`

so, `l=(r^2+h^2)^(1/2)`

`l=240^2+100^2)^(1/2)`

`l=260m`

so curved surface area `=pirl`

`=pirl`

`=pixx240xx260`

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