11. The students of a Vidyalaya were asked to participate in a competition for making and decorating penholders in the shape of a cylinder with a base, using cardboard. Each penholder 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?
Answers
Answered by
2
Answer:
for this we have to find surface area of the cylinder and area of circle for one base
cardboard required for one pen holder=2πrh+2πr^2
=2×22/7×3×10.5+2×22/7(3)^2
=254.47cm^3
cardboard required for 35 pen holders =254.47×35
=8906.45 cm^3 ans
hope it will help you please mark me brainlist thankyou
Similar questions