Question

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?​

Answer 1

Answer:

9th

Maths

Surface Areas and Volumes

Surface Area of Right Circular Cylinders and Cones

The students of a Vidyalaya...

MATHS

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 35competitors, how much cardboard was required to be bought for the competition?

MEDIUM

VIDEO EXPLANATION

ANSWER

Given:

R=3cm, H=10.5cm

⇒Surface area = Curved Surface Area +Base Area

=2πrh+πr2

=2×722×3×1010.5+722×3×3cm2

=198+7198cm2

=71584cm2

⇒Area of cardboard sheet used by competitor =71584cm2

⇒Area of cardboard sheet used by 35competitors =71584×35

=7920cm2

Answered By

toppr

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