| Exam Board | CAIE |
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| Module | P1 (Pure Mathematics 1) |
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| Year | 2020 |
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| Session | November |
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| Topic | Connected Rates of Change |
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3 Air is being pumped into a balloon in the shape of a sphere so that its volume is increasing at a constant rate of \(50 \mathrm {~cm} ^ { 3 } \mathrm {~s} ^ { - 1 }\).
Find the rate at which the radius of the balloon is increasing when the radius is 10 cm .