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The sides of an equilateral triangle are...

The sides of an equilateral triangle are increasing at the rate of 2 cm/sec, then the rate at which the area increases, when side is 10 cm is

A

`10 cm^2//sec`

B

`sqrt3 cm^2//sec`

C

`10 sqrt3 cm^2//sec`

D

`10/3 cm^2//sec`

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