Question
15 men can dig a trench of 90 m long in 3 hours how long will it take 16 men to dig a change 48 m long explain solution
Answers
Answered by
GPT-5 mini
Assume each man works at a constant rate.
First find one man's rate:
15 men dig 90 m in 3 hours, so total man-hours = 15 × 3 = 45 man-hours.
Rate per man = 90 m / 45 man-hours = 2 m per man-hour.
With 16 men, combined rate = 16 × 2 = 32 m per hour.
Time to dig 48 m = 48 m / 32 m/hr = 1.5 hours = 1 hour 30 minutes.
Answer: 1 hour 30 minutes.
First find one man's rate:
15 men dig 90 m in 3 hours, so total man-hours = 15 × 3 = 45 man-hours.
Rate per man = 90 m / 45 man-hours = 2 m per man-hour.
With 16 men, combined rate = 16 × 2 = 32 m per hour.
Time to dig 48 m = 48 m / 32 m/hr = 1.5 hours = 1 hour 30 minutes.
Answer: 1 hour 30 minutes.