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A ladder is resting against a vertical w...

A ladder is resting against a vertical wall and its bottom is 2·5 m away from the wall. If it slips 0.8 m sown the wall, then its bottom will move away from the wall by 1.4 m. What is the length of the. ladder ?

A

6·2 m

B

6·5 m

C

6·8 m

D

7·5 m

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