(1/15) + (1/12) = 1/x where x is the time the job will take when both work together.
The common denominator on the left is 60 and x=6 1/3.
The reason this equation works is that the "reciprocals" are RATES.
Squid B.
asked • 01/05/19Two combined times
Deisha can build a fence in 15 hours, and Travis can build a fence in 12 hours. How long will it take them together to build a fence?
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