Combined rate is 13/42
Rate is 1/7 & 1/6
Let unit work 1
So in 3 hours work done js 13/14
Work left to be done is 1/14
Time it will take Tom to complete
1/14 ×7= time
1/2 option C
Working independently, Susan can perform a certain task in 6 hours and Tom can perform it in 7 hours. If Susan and Tom work together on the task for 3 hours, at which point Susan leaves, how many hours will it take Tom to complete the task alone?
A. 1/14
B. 13/14
C. 1/2
D. 29/42
E. 1
Posted from my mobile device
Rate is 1/7 & 1/6
Let unit work 1
So in 3 hours work done js 13/14
Work left to be done is 1/14
Time it will take Tom to complete
1/14 ×7= time
1/2 option C
Bunuel wrote:
Working independently, Susan can perform a certain task in 6 hours and Tom can perform it in 7 hours. If Susan and Tom work together on the task for 3 hours, at which point Susan leaves, how many hours will it take Tom to complete the task alone?
A. 1/14
B. 13/14
C. 1/2
D. 29/42
E. 1
Posted from my mobile device
Statistics : Posted by Archit3110 • on 28 Jun 2023, 10:52 • Replies 2 • Views 141
