Question

A train is moving at a uniform speed of $84km/hour.$ Find the time required to cover a distance of $210km$.

Answer 1

The uniform speed of a train $=84km/hour$

$=84\times \frac{1000}{60}m/min$ $\left[1km/hr=\frac{1000}{60}m/min\right]$

$=1400m/min$

Now, the time required by train to cover a distance of $210km=\frac{210\times 1000}{1400}minutes$ $\left[1km=1000m\right]$

$=150minutes$

Hence, the time required by train to cover a distance of $210km$is $150minutes$.