Question

A solid Metallic hemisphere of diameter 21 cm is melted and recasted into a number of
Smaller cones, each of diameter 7cm
and height 9cm.find the number of cones so formed​

Answer 1

Answer:

21

Step-by-step explanation:

,Volume of hemisphere=4/3*22/7*10.5*10.5*10.5

=2425.5cmcube

Volume of cone= 1/3*22/7*3.5*3.5*9

=115.5cmcube

number of cones obtained by bigger hemispherical solid= Volume of hemisphere/Volume of cone

=2425.5/115.5

=21

Therefore 21 cones are formed

Sorry I did not know how to use mathematical symbols for pi and cm cube

I hope you understood my explation