Application of DerivativeHard
Question
The side of a square sheet is increasing at the rate of 4 cm per minute. The rate by which the area increasing when the side is 8cm long is -
Options
A.60 cm2/minute
B.66 cm2/minute
C.62 cm2/minute
D.64 cm2/minute
Solution
A = x2
= 2x × 
= 2 × 8 × 4 = 64 cm2/minute
= 2x × = 2 × 8 × 4 = 64 cm2/minuteCreate a free account to view solution
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