Question

A can complete a job in 20 hours. B alone can complete the same job in 15 hrs. A work for 9 hrs and then the remaining job is completed by B. How many hours will B be alone take to complete the remaining job?

Q: A can complete a job in 20 hours. B alone can complete the same job in 15 hrs. A work for 9 hrs and

The part of job that A completes in 9 hours = 9/20 Remaining job =1 - 9/20 = 11/20 Remaining job can be done by B in 11/20*15 = 33/4 = 8*1/4hrs

A 8 *1/4 hrs

B 6 *2/7 hrs

C 5 *1/9 hrs

D 9 *5/6 hrs

E None of these

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SBI Clerk

South Indian Bank Probationary Clerk

Question

A can complete a job in 20 hours. B alone can complete the same job in 15 hrs. A work for 9 hrs and then the remaining job is completed by B. How many hours will B be alone take to complete the remaining job?

Solution

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