Question

A solid metallic cone of diameter 2 cm and height 9 cm is melted and made into identical spheres each of radius 2 cm how many such Spear can be made

Answer 1

r= d\2= 2\2= 1

area of cylinder= पाईr square h=22\7×1×9=198\7

area of cylinder= 22\7×2× 9= 396\7

No. of sphere= 198\7 by 396\7=1\2