question_answer 92)

The two equation sides of an isosceles triangle with fixed base b are decreasing at the rate 3 cm per second. How fast is the area decreasing when the two equal sides are equal to the base ? 

Answer:

Let  is an isosceles With AB = AC = x cm. BC = b cm       Given that       Area of                                                 Hence the area of the given  is decreasing at the rate  cm2/sec.