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Question

A ladder leans against a vertical wall. The top of the ladder is 8m above the ground. When the bottom of the ladder is moved 2m farther away from the wall, the top of the ladder rests against the foot of the wall. What is the length of the ladder ?

A
10m
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B
15m
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C
20m
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D
17m
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Solution

The correct option is D 17m

Option (d)

Length of the ladder = x+2

Thus, 82+x2= (x+2)2

Solving for x, x=15

Length of ladder = 17


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