Question

A right triangle having sides 15 cm and 20 cm is made to revolve about its hypotenuse.find the volume and surface area of the double cone so formed.

Answer 1

1st thing is that the cone formed is single.
Volume= 1/3 pi r sq h........(1)
1/3 × 3.14 × (15 × 15) × 25 ( hieght = hypot.)_pythagoras

Then vol = 58875 cm cube.

CSA = surface ar.
pi × r × l
3.14 × 15 × 20 = 942 cm sq.

Answer 2

Answer:

Check your answer please