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Pannalal has done 1/3rd of a job in 20 days, Sai Prasad completes the rest of the job in 10 days. In how many days can they together do the job?
- A12 days
- B6 days
- C3 days
- D24 days
Answer not set
Discussion 1
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CCommunity
Time taken by Pannalal to do the job = 20/(1/3) = 60 days
Time taken by Sai Prasad to do the job = 10/(2/3) = 15 days
∴ Time taken by both Pannalal and Sai Prasad together to do the job = 1/(1/15 + 1/60) = 12 days
Time taken by Sai Prasad to do the job = 10/(2/3) = 15 days
∴ Time taken by both Pannalal and Sai Prasad together to do the job = 1/(1/15 + 1/60) = 12 days