Problema Solution
Brian was traing to run a marathon . During the three day period before the race he decided that he would train for a total of 11 hours . If he traind for 2 3/5 hours on his first day amd 2 9/10 on the secound day , how many hours would he need to train on the third day ?
Answer provided by our tutors
11 - (2 3/5 + 2 9/10) = 11 - ((2*5 + 3)/5 + (2*10 + 9)/10) = 11 - (13/5 + 29/10) = 11 - (2*13 + 29)/10 = 110/10 - 55/10 = 55/10 = = 5 5/10 = 5 1/2 = 5.5 hours
he would need to train 5 1/2 or 5.5 hours the third day.