Question
A boy goes to school with a speed of 3 km/hr and returns to the village with a speed of 2 km/hr. If he takes 5 hours in all, the distance between the village and the school is
A. 8 km
B. 7 km
C. 6 km
D. 5 km
Answer: C
Solution:
Let the required distance be x km.
Then
x/3 + x/2 = 5
⇒ 2x + 3x = 30
⇒ 5x = 30
=> x = 6 km