CBSE Class 12-science Answered
Let us take x as the distance covered by foot of the ladder in time ‘t’ and y be height of the top of the ladder at time ‘t’.
From the figure, we can see ABC is a
Right angle triangle
Differentiating this equations now with respect to t we get
When x = 5 m, y = 12 m
The height of the top of the ladder is decreasing at the rate of