A farmer harvested 5/8 of the field's crops and his son harvested 1/6 of the crops. The farmer harvests the remaindering crops by himself in 1 hour and 50 minutes. How long would it take for the farmer to harvest the entire field by himself?
5/8 + 1/6 =19/24 portion of harvest done by both men
1 - 19/24 =5/24 portion of harvest done by farmer himself in 1 hour and 50 minutes =1.8333 hours.
Therefore, the farmer could do the entire harvest by himself in:
24/5 x 1.83333=8.8 hours, or 8 hours and 48 minutes, or 528 minutes(which you got right.)
P.S. You Just need one variable X for the time rquired to harvest the entire field by himself.
