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Solve the Problem 112hr\frac { 1 } { 12 } \mathrm { hr }

Question 387

Multiple Choice

Solve the problem.
-One maid can clean the house in 5 hours. Another maid can do the job in 7 hours. How long will it take them to do the job working together?


A) 112hr\frac { 1 } { 12 } \mathrm { hr }
B) 3512hr\frac { 35 } { 12 } \mathrm { hr }
C) 135hr\frac { 1 } { 35 } \mathrm { hr }
D) 352hr\frac { 35 } { 2 } \mathrm { hr }

Correct Answer:

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