Question

four men can complete a job in three hours. five women can complete the same job in 2 hours. How many hours would it take a team of 2 men and 3 women to complete the job? Please help

Answer 1

2.15, because a man can do 0.0825 of the job in an hour and a woman can do 0.1 of the job, so 2 men and 3 women do 0.465 of the job in 1 hour, so they need to work 2.15 hours.

Answer 2

4M J 3h
2M (1/2)J 3h
2M(1/6)J 1h=======1

5W J 2h
1W (1/5)J 2h
1W (1/10)J 1h
3W (3/10)J 1h=======2

by 1 & 2:
(2M+3W) (1/6+3/10)J 1h
(2M+3W) (7/15)J 1h
(2M+3W) J (15/7)h

Answer 3

M-Men
W-Women
J-Job
h-hours