Question

A boy cycles down from his house to school at a speed of 18 kmph and reaches there in 30 minutes. Then distance between his school and house is

Answer 1

Speed = 18 kmph
Time taken = 30 minute or 1/2 hours
Distance = 18/2 = 9 km

Answer 2

Speed = Distance /Time

18 = Distance /30

18/60×30 = Distance

( since 18 km/h is in hour first convert it in minutes as time is given in mintues i.e 30 minutes

so divide it by 60 coz 1 hour= 60 mintues)

9 km = Distance