Math Is Fun Forum

markosheehan

Member

Registered: 2016-06-15

Posts: 51

rates of change

A spherical snowball is melting at a rate proportional to its surface area. That is, the rate at
which its volume is decreasing at any instant is proportional to its surface area at that instant.
If the snowball loses half of its volume in an hour, how long more will it take for it to
melt completely?
Give your answer correct to the nearest minute.

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: rates of change

Hi;

Check this answer out and make sure it is correct. Read the pdf too.

https://math.berkeley.edu/~ehallman/spr … e-sols.pdf

---

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

thickhead

Member

Registered: 2016-04-16

Posts: 1,086

Re: rates of change

Last edited by thickhead (2016-08-29 14:30:00)

---

{1}Vasudhaiva Kutumakam.{The whole Universe is a family.}
(2)Yatra naaryasthu poojyanthe Ramanthe tatra Devataha
{Gods rejoice at those places where ladies are respected.}