Multiple choice

20 men could complete a woprk in 80 days. They worked together for 60 days, after that due to bad whether the work is stopped for 10 days. How many more men should be employed so as to complete the work in time? 20 आदमी एक कार्य को 80 दिन में समाप्त कर लेंगे। वे 60 दिन तक कार्य करते हैं, उसके बाद खराब मौसम के कारण कार्य 10 दिन तक रूका रहा। कितने आदमी कार्य पर लगाये जायें ताकि कार्य समय पर समाप्त हो सकें?

  1. 10

  2. 5

  3. 20

  4. 30
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Total work = 20 men × 80 days = 1600 man-days. Work completed in 60 days = 20 × 60 = 1200 man-days. Remaining work = 400 man-days. After 10-day stoppage, only 10 days remain. Men needed = 400/10 = 40 men. Additional men required = 40 - 20 = 20 men. Option A (10) would give only 30 men total, insufficient to complete in 10 days.

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