CTET 2 Math and Science Jan 2021 Paper

Question : 58 of 150

Marks: +1, -0

A rectangular sheet of paper

88 {\cm} ×10 {\cm}

is folded without overlapping to make a cylinder of height

10 {\cm}

. What is the capacity (in litres) of the cylinder? (Take

\π={22}/{7}

)

Solution:

Let

r

be the radius of cylinder

2 \π r=88

⇒2 × {22}/{7} × r=88

⇒r=14\cm

Capacity of cylinder

=\π r^{2} h

={22}/{7} ×14 ×14 ×10

=6160 {\cm}^{3}=6.16 {\L}

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