MHT CET 2022 Mathematics question
A spherical iron ball of 10 cm radius is coated with a layer of ice of uniform thickness that melts at the rate of 50 cm / min. If the thickness of ice is 5 cm, then the rate at which the thickness of ice decreases is
Answer: (A)
Solution
When the ice thickness is 5 cm the outer radius is cm. The volume of ice is , so . Since the ice melts, , giving cm/min. The thickness equals , so it
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