Question

A boy walk to his school with constant speed of 4 kilometre per hour and is there in 30 minutes i'm the distance of school from his house

Answer 1

$4 \times 1000 \div (1 \times 60) \\ = 66.66 \\ 66.66 \times 30 = 2000mts$
So the distance is 2 km

Answer 2

Distance =speed /time =4/1/2=2km