MHT CET 2026 Mathematics question
A spherical raindrop evaporates at a rate proportional to its surface area. The differential equation involving the rate of change of its radius with time is.... (where is a positive constant)
Answer: (A)
Solution
Volume and surface area . Evaporation means the volume decreases at a rate proportional to the surface area: with . Also . Therefore , giving
See the full step-by-step solution
Create a free account to read the complete working, and practise questions like this in a timed test.
Create a free account