Answer:

10 men can dig well in 9 days how many days can 120 men did the same well?

10 men dig the well in 9 days.

Let's suppose the total work done by these men is one.

So if 10 men take 9 days then 10 men did 1/9 work each day.

Assuming efficiency for each man equal.

Therefore one man does 1/90 work each day.

So 120 men can do 120/90 work each day.

Let no of days taken by 120 men is x.

So, (120/90 )* x= 1

Therefore x = 4/3

Step-by-step explanation:

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Answer:

10 men can dig well in 9 days how many days can 15 men did the same well?

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10 men dig the well in 9 days.

Let's suppose the total work done by these men is one.

So if 10 men take 9 days then 10 men did 1/9 work each day.

Assuming efficiency for each man equal.

Therefore one man does 1/90 work each day.

So 15 men can do 15/90 work each day.

Let no of days taken by 15 men is x.

So, (15/90 )* x= 1

Therefore x = 6

So 15 men can dig well in 6 days