Question 984018
The sides of an equilateral triangle are increasing at the rate of 5 inches per second.How fast is the area of the triangle increasing when the sides are 10 inches long? 
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s = side length
{{{Area = b*h/2 = s^2*sqrt(3)/4}}}
{{{dA/dt = (s*sqrt(3)/2)*(ds/dt)}}}


At s = 10 --> {{{5*sqrt(3)*5 = 25sqrt(3)}}} sq in/sec