Asked by Anonymous
                Jim can fill a pool in 30 min, sue can do it in 45 min, Tony can do it in 90min, how long would it take all three to fill the pool together? How would i figure this out?
            
            
        Answers
                    Answered by
            Ms. Sue
            
    See <b>Related Questions</b> below.
    
                    Answered by
            Reiny
            
    Jim's rate = pool/30
Sue's rate = pool/45
Tony'rate = pool/90
combined rate = pool/30 + pool/45 + pool/90
= (3pool + 2pool + pool)/90 = 6pool/90
= 2pool/30
time to fill pool with combined rate
= pool/(2pool/30)
= 1/(2/30)
= 15
    
Sue's rate = pool/45
Tony'rate = pool/90
combined rate = pool/30 + pool/45 + pool/90
= (3pool + 2pool + pool)/90 = 6pool/90
= 2pool/30
time to fill pool with combined rate
= pool/(2pool/30)
= 1/(2/30)
= 15
                    Answered by
            Anonymous
            
    Im still not sure how you are geting the (3pool+2pool+pool) where are those numbers coming from?
    
                    Answered by
            Ms. Sue
            
    Jim can fill 3 pools in 90 minutes; Sue fills 2 pools in 90 minutes . . .
    
                    Answered by
            Anonymous
            
    oh wow thank you so much i totally understand now 
    
                    Answered by
            Ms. Sue
            
    You're very welcome.
    
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