1.

Two parallel sides of a rectangle are being lenghtened at the rate of 2 cm/sec while the other two sides are shortened in such a way the area of the rectangle is 50 sq. cm The rate of change of the perimeter when the length of an increasing side 5 cm is

Answer»

2 cm/sec
6 cm/sec
`-2 cm/sec`
`-4 cm/sec`

ANSWER :D


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