## Question

###### If a snowball melts so that its surface area decreases at a rate of 0.4 cm...

If a snowball melts so that its surface area decreases at a rate of 0.4 cm /min, find the rate at which the diameter decreases when the diameter is 9 cm.

## Answers

Let A=4tigt be despace are of snow ball . Guren that df = -00¢ on min (4939=25.4 40(2397)=-6.¢ -) &tis de monte 2017 . GoT dicemetes=B=90m . Then Jor dies g Herte et ona) The got commdiameter = 2 (Jodices D = 21 * =L 49 = (क) का The dicometos decreases at a rate as to com

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