Problema Solution
john walks for one and a half hour at an average speed of 5.5 km/h. then he walks for one and a half hours at an average speed of 5 km /h . then he walks for one and half hours at an average speed of 4.5 km/h , how far does john walks?
Answer provided by our tutors
distance walked by John = (3/2)*5.5 + (3/2)*5 + (3/2)*4.5 = (3/2)*(5.5+5+4.5) = (3/2)*15 = 45/2 22.5 km.