Find the length of cloth used in making a conical pandal of height 100 m and base radius 240 m, if the cloth is 100π m wide.
We have ,
Height of conical pandal = 100m
Base radius of pandal = 240 m
Slant height l = √( r2+h2) = √2402+1002 =√67600 = 260 m
Curved surface area of cloth = πrl = π×260×240
Hence length of 100π m wide cloth = curved surface area of cloth/ width of cloth
= π×260×240 / 100π
= 26×24 = 624m