Question

A ladder 5 metre long leans against a vertical wall. The bottom of the ladder is 3 metre from the wall. If the bottom of the ladder is pulled 1 metre farther from the wall, how much does the top of the ladder slide down the wall

• A. 1 m
• B. 7 m
• C. 2 m
• D. None of these

Answer 1

Answer: (A)

1 m

Answer 2

$A B = 4 m$ $\Rightarrow$ $B D = 3 m$

$A D = 4 - 3 = 1 m$