Question

A conical hole is drilled in a circular cylinder of height 15 cm and radius 8 cm which has same height and same base radius find the total surface area after drilling of cone take( pai is equal to 3.14)

Answer 1

hello, dear
TSA = Pie * r * (l + r)
         = 22/7 * 8 * (17 + 8)
         = 22/7 * 8 * 25
         = 628.57 cm^2
i hope you understand dear :-)

Answer 2

ans:1382cm2
S.A of cylinder curved side:2