Problema Solution
Jack usually mows his lawn in 5 hours. Marilyn can mow the same yard in 3 hours. How much time would it take for them to mow the lawns together?
Answer provided by our tutors
Jack will mow 1/5 per hour. Marilyn will mow 1/3 per hour.
1/5 + 1/3 =(3+5)/15 = 8/15
Together they will mow 8/15 per hour.
Total hours x mowed per hour = 1
Hours x 8/15 = 1
Hours = 1/(8/15)
Hours = 1.89