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CUET · MATHS · PYQ PAPER 2023

An edge of a variable cube is increasing at the rate of 3 cm/s. How fast is the volume of the cube increasing when the edge is 10 cm long?

  1. A \(100 cm^3 / s\)
  2. B \(300 cm^3 / s\)
  3. C \(900 cm^3 / s\)
  4. D \(600 cm^3 / s\)
Verified Solution

Answer & Solution

Correct Answer

(C) \(900 cm^3 / s\)

Step-by-step Solution

Detailed explanation

\(V = s^3\) \(\frac{dV}{dt} = 3s^2 \frac{ds}{dt}\) \(\frac{dV}{dt} = 3(10)^2 (3)\) \(\frac{dV}{dt} = 900 \text{ cm}^3\text{/s}\)
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