Question

A train covers 15 km in 45 minutes ,find the speed of the train in metres per second

Answer 1

$45 \div 15 = 3$

it will cover 3 kilometre per minute
Now, converting it into seconds.
$3 \div 60 = 0.05$
it will cover 0.05km per second.
If converted into metres,
$0.05 \times 1000 = 50$
it will cover 50m per second