Question

it is require surface area of a right circular of hight 21 cm is 176 cm2 find the diameter of the cylinder​

Answer 1

height is 21cm

T.S.A.is 176cm^2

T.S.A=2πr(r+h)

176=2×22/7×r(r+21)

176×7/44=r(r+21)

1232/44×r+21=r

28/r+21=r

d=2(28/r+21)

d=65/2r+42