Problema Solution
a father and his son leave home at the same time in separate cars.the father drive to his office , a distance of 24 kilometers, and the son drives to school, a distance of 28 kilometers. They arrive at their destinations at the same time. What are their average rates, if the father's average rate is 12 kilometers per hour less than his son
Answer provided by our tutors
rate = distance / time
let rate of father = f
rate of son = s
t is same in this case
t=distance/rate
24/f = 28 /s
but f=s-12
24/(s-12) = 28/s
24s = 28s -336
s =84
f= 72