Question

A rectangular sheet of paper having length 28 cm and breadth 12 cm is folded along its
breadth to form a cylinder. Find the curved surface area of the cylinder.

Answer 1

Answer:

length=28cm ,diameter =12cm So the radius =diameter/2=6

Curved surface area of cylinder =

$2\pi \: rh$

=

$2 \times \frac{22}{7} \times 6 \times 28 \\ = 2 \times 22 \times 6 \times 4 \\ = 44 \times 24 = 1056 {cm}^{2}$