Question

find the lateral area and surface area of a cylinder with a base area of 49π and a height that is 2 times the radius​

Answer 1

Lateral surface area of a cylinder = base perimeter × height

Here, πr² = 49π

r² = 49

r = 7

Height = 2r = 2×7 = 14

so, L.S.A = 2πr×h = 2π×7×14

= 196π

Hope it helps.