A) 30 days
B) 35 days
C) 40 days
D) 45 days
Correct Answer: A
Solution :
Let A's working rate is 2U per day and B's working rate is 3U per day. \[[\because \,\,\,\,\,{{T}_{A}}:{{T}_{B}}=32]\] \[\therefore \] \[(A+B)'s\] working rate is 5U per day and work is completed in 18 days \[\therefore \] Total work \[=18\times 5=90\] Units and B's rate is 3U per day \[\therefore \] Time taken by B to complete \[=\frac{90U}{3U}\] = 30 daysYou need to login to perform this action.
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