Question

Q.11   The students of a Vidyalaya were asked to participate in a competition for making and decorating pen holders in the shape of a cylinder with a base, using cardboard. Each pen holder was to be of radius 3 cm and height 10.5 cm. The Vidyalaya was to supply the competitors with cardboard. If there were 35 competitors , how much cardboard was required to be bought for the competition?

Answer 1

CSA of cylinder +area of bottom circle
2πr+πr²
[(2×22/7×3×10.5)+22/7×3×3]
198+28.28
226.28cm
cardboard required for 35 comptetiors
(35×226.28)cm²
7920cm²