The unit for measurement of the distance between two cities is ________.
Hence, the unit for measurement of the distance between two cities is kilometre (km).
Which of the following are not correct?
(i) The basic unit of time is second.
(ii) Every object moves with a constant speed.
(iii) Distances between two cities are measured in kilometres.
(iv) The time period of a given pendulum is not constant.
(v) The speed of a train is expressed in m/h.
Name a convenient unit "t"to be used to measure the distance between two cities.