A spherical balloon is filled with 4500 cubic meters of helium gas. If a leak in the…
Mathematics · JEE Main · NTA Exams — Limit, Continuity and Differentiability
A spherical balloon is filled with \(4500 \pi\) cubic meters of helium gas. If a leak in the balloon causes the gas to escape at the rate of \(\text { 72π }\)cubic meters per minute, then the rate (in meters per minute) at which the radius of the balloon decreases 49 minutes after the leakage began is
- \(\frac{9}{7}\)
- \(\frac{7}{9}\)
- \(\frac{2}{9}\)
- \(\frac{9}{2}\)
Answer
(C) 2 9
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