1.

Each 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 (in cm^2/sec)

Answer»

`10sqrt(2)` sq.cms/sec
`10sqrt(3)` sq.cms/sec
10 sq.cms/sec
5 sq.cms/sec

Answer :B


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