A square plate is expanding uniformly, the side is increasing at the r

1.	A square plate is expanding uniformly, the side is increasing at the rate of 5cm/sec what is the rate at which the area and its perimeter is increasing when the side is 20 cm long?
Answer» Area, A = l² ⇒dA/dt = 2l × dl/dt = 2 × 20 × 5 dA/dt = 200cm²/sec. P = 41 ⇒ dP/dt = 4 dl/dt 4 × 5= 20cm/sec

A square plate is expanding uniformly, the side is increasing at the rate of 5cm/sec what is the rate at which the area and its perimeter is increasing when the side is 20 cm long?

Answer»

Area, A = l² ⇒dA/dt = 2l × dl/dt = 2 × 20 × 5

dA/dt = 200cm²/sec.

P = 41 ⇒ dP/dt = 4 dl/dt 4 × 5= 20cm/sec

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A square plate is expanding uniformly, the side is increasing at the rate of 5cm/sec what is the rate at which the area and its perimeter is increasing when the side is 20 cm long?

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