A car travels a distance of 15 km in 20 minute. Find the speed of the car in:

(i) km h^-1

(ii) m s^-1

How long a train will take to travel a distance of 200 km with a speed of 60 km h^-1?

A boy travels with a speed of 10 m s^-1 for 30 minute. How much distance does he travel?

Express 15 m s^-1 in km h^-1.