Question

A work is done by 12 men or 15 women in 20 days . What is the time taken by 4 men and 5 women to complete this work ?​

Answer 1

Answer:

12 men and 15 women take 5 days to complete the work.

Step-by-step explanation:

Since 4/x + 5/y is the work done by 4 men and 5 women together in a day, they would take 60 days to complete the same amount of work.

Answer 2

Time taken by 12 men = 20 days

Or, Time taken by 15 women = 20 days

Now, time taken by 1 man = 20/12 = 1.7 days

Or, time taken by 1 woman = 20/15 = 1.3 days

So, time taken by 4 men = 4× 1.7 = 6.8 days

Or, time taken by 5 women = 5×1.3 = 6.5 days

Hence, time taken by 4 men and 5 women to complete this work = 7 days approx.

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