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Solve the Problem 19hr\frac { 1 } { 9 } h r

Question 104

Multiple Choice

Solve the problem.
-Martha can rake the leaves in her yard in 2 hours. Her brother can do the job in 7 hours. How long will it take them to do the job working together?


A) 19hr\frac { 1 } { 9 } h r
B) 145hr\frac { 14 } { 5 } \mathrm { hr }
C) 114hr\frac { 1 } { 14 } \mathrm { hr }
D) 149hr\frac { 14 } { 9 } \mathrm { hr }

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