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The bridge is completed in 20 days by 80 men. How long will it take 70 men to complete the work?
  1. 29 days
  2. 26 days
  3. 22.86 days
  4. 27 days
Explanation

Step 1: Find total work in man-days

80 men complete the bridge in 20 days.

Total work = man-days


Step 2: Find time for 70 men

Total work​/70​

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