A can do13 of work in 5 days and B can do 25 of the work in 10 days.In how many days can both A and B together do the work?
734
845
10 days
938
A
734
B
845
C
938
D
10 days
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Solution
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A's rate in Work days: (13∗5)=(13∗13)=115
B's rate, in Work days: (25∗10)=(25∗110)=250=125
LCM of rates of A, 115 , and B, 125 is 150.
combine rate of A and B:(10150+6150)=16150=875
workrate=time
⟹1875=time
⟹time=758=938
So, option (c) is correct.
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