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120 men can do a work in 90 days,how many more men required to complete the same work in 40 days?
  1. 60
  2. 90
  3. 120
  4. 270
Explanation

To find how many more men are needed, we can use the formula for work:

Work=Men×Daystext{Work} = text{Men} times text{Days}

Initially, 120 men can complete the work in 90 days. The total work can be represented as:

120×90=10800 man-days120 times 90 = 10800 text{ man-days}

Now, we need to find how many men are needed to complete the work in 40 days:

Required Men=1080040=270 mentext{Required Men} = frac{10800}{40} = 270 text{ men}

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