1.

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

Answer»
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


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