Mensuration Practice Test 7

Question : 9 of 40

Marks: +1, -0

Two metallic sheets of dimensions 16 × 9 cm are folded to form a cylindrical shape. Find the difference in the curved surface area of both cylinders if one of the metallic sheets is folded at length and the other at the width.

7 $cm^2$
8 $cm^2$
9 $cm^2$
No difference

Validate

Solution:

Curved surface area of cylinder folded at length = 2πrh
=

2 × π × {16}/{2π} × 9

144 cm^2

Curved surface area of cylinder folded at width = 2πrh
=

2× π × 9/{2π} × 16

144 cm^2

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