A boy walks to his school with a constant speed of 4 km/h and reaches there in 30 minutes. Find the distance of the school from his house.
Speed = 4 km/h
Time taken = 30 minutes = ½ h = 0.5 h
Distance = speed x time
= 4 km/h x ½ h
= 2 km
Hence, distance of school from his house is 2 km.