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The length of the side of a square sheet...

The length of the side of a square sheet of metal is increasing at the rate of `4cm//sec`. The rate at which the area of the sheet is increasing when the length of its side is 2cm, is

A

`16cm^2//sec`

B

`8cm^2//sec`

C

`32cm^2//sec`

D

`4cm^2//sec`

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The correct Answer is:
A
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