Answers

2014-05-26T16:11:14+05:30
Let h is altitude & b is base of triangle
let db/dt = x
A = h*b/2
100 = 10*b/2
b = 20 cm.
dA/dt = 2
dh/dt = 1
dA/dt = (b*dh/dt + h*db/dt)/2
2 = (20*1 + 10*x)/2
x = -1.6
hence base of triangle is decreasing at the rate of -1.6cm²/min.
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