A can do 75% of a job in 9 days and b can do half of the job in 8 days. if they work on it together, then in how many days can they do half of the job? options:
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GIVEN-
A can complete 75%job in 9 days
B can complete 50% job in 8 days
TO FIND-
If they work together then the number of days to complete the job
SOLUTION
A can complete the whole job in 100×9/75=12 days
B can complete the whole job in 100×8/50=16 days
A can do 1/12 part of job in one day
B can do 1/16 part of job in one day
The part of job done by A & B in one day =1/12+1/16
=8+6/96
=14/96
=7/48
so the no. days are 48/7
A can complete 75%job in 9 days
B can complete 50% job in 8 days
TO FIND-
If they work together then the number of days to complete the job
SOLUTION
A can complete the whole job in 100×9/75=12 days
B can complete the whole job in 100×8/50=16 days
A can do 1/12 part of job in one day
B can do 1/16 part of job in one day
The part of job done by A & B in one day =1/12+1/16
=8+6/96
=14/96
=7/48
so the no. days are 48/7
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