A and B can do a job in 15days and if a is thrice as efficient as B, in how many days will
A finish the job working alone
please solve it...
Answers
Answered by
1
Answer:
B will take 10 days to complete the work alone
Answered by
2
Answer:
A alone can finish the work in 20 days
1) Let time taken by A alone is x days.
2) Since, A is three times efficient than B, time taken by B would be 3x days.
3) If they work together, they finish work in 15 days.
4) Work done by A in on day = 1/x
5) work done by B in one day = 1/3x.
6) Total work done by them in one day would be 1/x+ 1/3x = 4/3x
7) Time taken to complete the work together is 3x/4.
8) Equating, 3x/4 = 15
9) x = 20 days
Similar questions