Mathematics · Differential Equations
A spherical raindrop evaporates at a rate proportional to its surface area. If originally its radius is 3 mm and 1 hour later it reduces to 2 mm, then the expression for the radius R of the raindrop at any time t is:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 13R = 9 - t
- 2R = 3 - t
- 3R(t + 3) = 9✓
- 46R = t + 2
Correct answer
R(t + 3) = 9
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