A can do a job in 18 days and b can do it in 30 days. a and b working together will finish twice the amount of work in ------- days?
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a and b completed work is 11 1/4
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Given :
- Time taken by A = 18days
- Time taken by B = 30days
To Find :-
Number of days required to complete double work when they work together.
Solution:-
Total work = L.C.M(18,30)
Total work = 90
Efficiency of A = 90/18
Efficiency of A = 5
Similarly;
Efficiency of B = 90/30
Efficiency of B = 3
According to Question :-
Twice of the given work will be = 2×90 = 180
Total time taken by A +B to complete the work = 180/8
Total time taken by A +B to complete the work = 180/8 = 45/2 = 22.5 days
Hence :-
The required answer is 22.5 days.
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