Asked by JJ
The length of a rectangle is increasing at a rate of 9 cm/s and its width is increasing at a rate of 7 cm/s. When the length is 15 cm and the width is 10 cm, how fast is the area of the rectangle increasing?
Answers
Answered by
Reiny
A = lw
dA/dt = l dw/dt + w dl/dt
for the given case
dA/dt = 15(9) + 10(7)
= ...
dA/dt = l dw/dt + w dl/dt
for the given case
dA/dt = 15(9) + 10(7)
= ...
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