Question

a solid wooden cone with diameter 14cm and vertical length 24cm is vertically cut into two equal halves. one half is to be covered by paper at rate of rs 7per sq. cm find total cost of paper required?​

Answer 1

V = 392
`\pi`

Explanation:

The volume of a cone is: V =
`(1)/(3) \pi r^(2) h`

diameter = 14 h = 24

diameter = 2r ---> r = 7

V =
`(1)/(3) \pi (7)^(2) (24)`

V =
`(1)/(3) \pi (49)(24)`

V =
`(1)/(3) \pi (1176)`

V = 392
`\pi`