Jim can fill a pool carrying buckets of water in 30 minutes. Sue can do the same job in 45 minutes. Tony can do the same job in 1 1/2 hours. How quickly can all three fill the pool together?
by 
MissCathy1982
ANSWERS: 3
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Jim fills pools at 2 pools per hour. Sue at 1/(3/4) = 4/3 pools per hour. Tony at 1/(1 1/2) = 1/(3/2) = 2/3 pools per hour. together they fill the pool at 12/6 + 8/6 + 4/6 = 24/6 pools per hour = 4 pools per hour. = 15 mins per pool. Strange question. These must be very small pools.
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They should fire Tony.
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Are we talking middle school math or is synergy being factored in? Are each working independently or are they in a Bucket Brigade?
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