Given: A walked at 10 km/hr to reach school but returned on a rickshaw at the speed of 12.5 km/hr to reach home. Total time taken by A is 5 hours. Concepts used: Distance = Speed × time Calculation: Let the distance between the school and home be x km. Distance = Speed × time Time = Distance/Speed ⇒5=x/10+x/12.5 ⇒5=(5x+4x)/50⇒5=9x/50 ⇒x=5×50/9 km ⇒x=250/9 km ∴ Distance covered between school and home for A is 250/9 km.