A swimming pool has four faucets. The first can fill the entire pool with water in two days, the second - in three days, the third - in four days, and the last one can fill the pool in 6 hours.
How long will it take to fill the pool using all 4 faucets together?
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1/3+1/2+1/4+4 = 61/12
=12/61
=4.72 hours
=12/61
=4.72 hours
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