Question
The lateral surface area of a hollow cylinder is 4224 cm2. It is cut along its height and formed a rectangular sheet of width 33 cm. Find the perimeter of rectangular sheet?
Solution
∵ Lateral surface area of a cylinder = 4224 cm2
and let length of the rectangular sheet = l cm
∴ 33 x l = 4224
l = cm
Now perimeter of the rectangular sheet = 2[Length + Breadth]
= 2[128 cm + 33 cm]
= 2 x 161 cm
= 322 cm