Saturday

March 28, 2015

March 28, 2015

Posted by **Sean** on Tuesday, October 17, 2006 at 10:17pm.

The answer is 15 minutes. But how?

Figure the rate each can fill the pool

jim rate= 1/30 (1pool/30 min)

same relation for others.

The total rate then is the sum...

ratetotal=1/30 + 1/45 + 1/90

so we have one pool to do in this rate in some time T.

1= ratetotal*time

solve for time.

BobP answered this correctly, I thought I'd just answer it for the practice.

This kind of problem requires you to determine the individual rates, then add them to get a total answer. It looks like

1pool(1/30min + 1/45min + 1/90min) = 1pool (6/90min) = 1pool/15min

These kinds of problems are very common on tests for some reason. Change the numbers and try working another problem similar to this just for practice.

**Answer this Question**

**Related Questions**

Math - Jim can fill a pool carrying bucks of water in 30 minutes. Sue can do the...

math - Jim can fill a pool carrying buckets of water in 30 minutes. Sue can do ...

math - Jim can fill a pool carrying buckets of water in 30 minutes. Sue can do ...

math - Jim can fill a pool carrying buckets of water in 30 minutes. Sue can do ...

Math - Jim can fill a pool carrying buckets of water in 30 minutes. Sue can do ...

math - Jim can fill a pool carrying buckets of water in 30 minutes. Sue can do ...

algebra - Pump A can fill a swimming pool in 6 hours and pump B can fill the ...

Algebra - Sue can shovel snow from her driveway in 45 minutes. Jim can do the ...

math - 8 workers together at the same rate finished a painting job in 5 hours. ...

ALGEBRA - Janet can shovel snow from her driveway in 55 minutes. Jim can do the ...