Question

Which of the following are not correct? 

Every object moves with a constant speed.

Distances between two cities are measured in kilometres.

The basic unit of time is second.

The speed of a train is expressed in m/h.

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Answer 1

Answer:

the speed of train is expressed in m/h is incorrect

Explanation:

the speed of train is expressed in m/s or in k/h

Answer 2

$\small{ \mathfrak{ \green{These \: two \: are \: not \: correct⇉}}}$

ThEvery object moves with a constant speed.

The speed of a train is expressed in m/h.