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A man of height 1.8 metre is moving away...

A man of height 1.8 metre is moving away from a lamp post at the rate of `1.2m//sec`. If the height of the lamp post be 4.5 metre, then the rate at which the shadow of the man is lengthening is

A

`0.4m//sec`

B

`0.8m//sec`

C

`1.2m//sec`

D

None of these

Text Solution

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The correct Answer is:
B
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