1.

The side of an equilateral triangle expands at the rate of sqrt(3) cm/sec. When the side is 12 cm, the rate of increase of its area is ……….

Answer»

`12CM^(2)//sec`
`18 CM^(2)//sec`
`3sqrt(3)cm^(2)//sec`
`10cm^(2)//sec`

Answer :B


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