Question

A semi circle sheet of metal of diameter 28cm is bent to form a open conical cup. Find its capacity

Answer 1

semi circle perimeter=π×14=44
cone l=14
perimeter of semi circle=perimeter of base
44=2πr
44=2×22/7×r
r=7

7^2+h^2=14^2
h^2=196-49
h^2=147
h=12.12

volume=1/3πr^2h=622.38