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A 198-cm tall girl lies on a light (mass...

A `198-cm` tall girl lies on a light (massless) board which is supported by two scales one under the top of her heal and one beneath the bottom of her feet. The two scales read respectively `36` and `30 kg`. What distance is the centre of gravity of this girl from the bottom of her feet? .

A

`99cm`

B

`90cm`

C

`108cm`

D

`82cm`

Text Solution

Verified by Experts

The correct Answer is:
C
Let the required distance is `x`, then balancing the torque about centre of gravity
`(30g)x=(36g)(198-x)x=108cm`
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