SSC CGL 7 06 2019 Shift 1 Paper

Question : 67 of 100

Marks: +1, -0

A cylindrical road roller made of metal is one meter long. Its inner radius is 27 cm and the thickness of the metal sheet rolled into it is 9 cm. what is the weight of the roller. If 1 cm

^{3}

of the metal weight 8 g?

441 π kg
442.4 π kg
449 π kg
453.6 π kg

Validate

Solution:

Volume of roller

=\π\× 100 [(36)^{2}-(27)^{2}\ ]

=\π\× 100 \× 63 \× 9 \ {\cm}^{3}

=56700 \π\ {\cm}^{3}

Weight

=\ {56700 \π}/{1000} \× 8

=453.6 \π\ {\kg}

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