The side of an equilateral triangle is increasing at the rate of 3cm/sec. The rate at which the are of the triangle is increasing, when the side is 4c
Question
The side of an equilateral triangle is increasing at the rate of 3cm/sec. The rate at which the are of the triangle is increasing, when the side is 4cm is:
A.
B.
C.
D.
Correct option is B
Let side of equilateral triangle be x, then area is