Published by:
CGP EDU Academic Team
Published on: August 14, 2026
A ladder 5 m in length is resting against vertical wall. The bottom of the ladder is pulled along the ground away from the wall at the rate of 
. The length of the highest point of the ladder when the foot of the ladder 
away from the wall decreases at the rate of
Text Solution
Verified by ExpertsThe correct answer is:
A
According to fig. 
.....(i)
Differentiate (i) w.r.t. t , we get
…..(ii)
Here 
and 
From (i), 
From (ii), 
So, 
Hence, length of the highest point decreases at the rate of 2 m / sec .
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