The speed of a car is 72 km h^-1. Express it in m s^-1.

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

Arrange the following speeds in increasing order — 10 m s^-1, 1 km min^-1, 18 km h^-1.

A train takes 3 h to travel from Agra to Delhi with a uniform speed of 65 km h^-1. Find the distance between the two cities.