If John covers a certain distance in 1 hr. 24 min. by covering two third of the distance at 4 kmph and the rest at 5 kmph, then find the total distance.	Pick
A) 9 km
B) 2 km
C) 1 km
D) 6 km
E) 7 km
Explanation:   Let the total distance be y km. Then,   (2/3)y/4 +(1/3)y/5 =7/5   y/6 + y/15 = 7/5   7y =42   y = 6 km   ANSWER:6 km
<result>D</result>
If John covers a certain distance in 1 hr. 24 min. by covering two third of the distance at 4 kmph and the rest at 5 kmph, then find the total distance.