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A ladder 20 ft long leans against a vert...

A ladder 20 ft long leans against a vertical wall. The top end slides downwards at the rate of 2 ft per second. The rate at which the lower end moves on a horizontal floor when it is 12 ft from the wall is

A

`(8)/(3)`

B

`(6)/(5)`

C

`(3)/(2)`

D

`(17)/(4)`

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Verified by Experts

The correct Answer is:
A
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