Question

If 5 people can paint a house in 4 hrs, how long will it take 3 people??

Answer 1

(4/5) hr/manhouse * 3 man = 12/5 hr/house

= 2 2/5 hr

= 2.4 hr

Answer 2

If 5 people can paint a house in 4 hours, and now you have 2 less people, 3 people will take longer than 4 hours. Just think about that.
How can 3 people paint a house faster than 5 people???
Ans. 6 hours 40 minutes.