71. If 12 men can finish a work in 20 days, then the number of days required to complete the same work
by 15 men is:
Answers
Answer:
16 days .
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Given:
Certain work can be done by 12 men in 20 days.
To Find:
How many days are required by 15 men to complete the same work?
Solution:
1. Certain work can be done by 12 men in 20 days,
=> If 12 men can do the job in 20 days,
=> The same job can be done by 1 man in 20 x 12 days,
=> Time taken to complete the same job by 1 man = 240 days.
=> 1 man can finish the same job in 240 days.
2. The time taken to finish the job by 15 men can be calculated as follows,
=> If 1 man can do the job in 240 days then,
=> 15 men can do the same job in 240/15 days,
=> 15 men can do the same job in 16 days.
=> Time taken by 15 men to complete the same work = 16 days.
Therefore, 15 men can do the same job in 16 days.