SOLUTION: 2 persons a and b they can complete a certain work in 16 and 20 days they work together for 4 days then a left in how many days the b will complete the job

Algebra ->  Problems-with-consecutive-odd-even-integers -> SOLUTION: 2 persons a and b they can complete a certain work in 16 and 20 days they work together for 4 days then a left in how many days the b will complete the job      Log On


   

Question 971252: 2 persons a and b they can complete a certain work in 16 and 20 days they work together for 4 days then a left in how many days the b will complete the job
Answer by anand429(138) About Me  (Show Source):
You can put this solution on YOUR website!
a's 1 day work = 1/16 units
b's 1 day work = 1/20 units
So, in 4 days, total work by a and b = 4%2A%28%281%2F16%29%2B%281%2F20%29%29
=%289%2F20%29units
Balance+work+=+11%2F20 units
No. of further days taken by b = %2811%2F20%29%2F%281%2F20%29
=11 days