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A ladder 20 ft long is resting angainst ...

A ladder 20 ft long is resting angainst a smooth vertical wall at angle of `30^(@)` with it Its foot lies on a rough ground with coefficient of friction `0*3` If the weight of the ladder is 30 kg, then a man of 60 kg weight can climb on the ladder up to the height

A

`(9sqrt(3)-5)` ft

B

`(9sqrt(3)+sqrt(5))ft`

C

`9sqrt(3)` ft

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
A
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