Question

manav takes 20 min to reach his school from home,walking at the rate of 4 km per hour how long will it take manav to reach his school , if he walks at the rate of 3 km per hour

Answer 1

distance from home to school is (20/60 * 4) = 4/3 km so time taken by him to cover distance of 4/3 km at speed of 3 km/hour = 4/9 hours = 80/3 minutes