If it takes 50 workers 4 hours to dig a hole, how long should it take 30 workers to dig the same hole?

A 2 hrs, 24 mins
B 6 hrs, 12 mins
C 5 hrs, 12 mins
D 6 hrs, 40 mins

Correct Answer: 6 hrs, 40 mins

Here, 4 hours = 240 minutes Now,  50 workers can dig the hole in 240 minutes So, 30 workers can dig the hole in 240×50/30 = 400 minutes = 6 hours 40 minutes
Bissoy MCQ
#গণিত #সময় ও কাজ (Time and work) #Bangladesh Development Bank Ltd #Bangladesh Shilpa Bank Ltd - Officer - 2004

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