Question

volume of come is 1212 cm and it's height is 24 CM find the surface area of the come π=22/7

Answer 1

Volume of cone=1/3πr2h=1212
1/3×22/7×r2×24=1212
r2=1212×7×3/22×24
r2=√48•20
r=6.9
Slant height L = √ h2 + r2
√(24)2+(6.9)2
√576+47.61
√623.61
24.97
Total surface area of cone= C.S.A + Area of base
=πrl+πr2
=πr(l+r)
=22/7×6.9(24.97+6.9)
=151.8/7(31.87)
=4837.866/7
=691.12cm2
I think this is the answer...