question_answer

The side of an equilateral triangle expands at the rate of 2 cm/sec. The rate of increase of its area when each side is 10 cm is ________.

A)  \[10\sqrt{3}\,\,c{{m}^{2}}\text{/}\sec \]           

B)  \[5\,\,c{{m}^{2}}\text{/}\sec \]

C)  \[8\sqrt{3}\,\,c{{m}^{2}}\text{/}\sec \]

D)  \[5\sqrt{3}\,\,c{{m}^{2}}\text{/}\sec \]

E)  None of these