Write your question here... The radius of a circular disc is increasing at the rate of 0.5 cm/sec. Ar what rate is the area of the disc increasing when its radius is 6cm?
1 Answer
Feb 18, 2018
Rate of change in area with respect to time is
Explanation:
Let area of disc be A cm^2 and it's radius be r cm,
Then,
Differentiating with respect to time,
From the question, we can infer that,
Substituting these values in equation,
Thus, rate of change of area is