Calculating time given speed and distance

Question

Joanna drives for 400km at an average speed of 80km/h.

How long was her journey?

Triangle illustrating time equals distance over speed.

Time = \frac{{Distance}}{{Speed}}

Time = \frac{{400}}{{80}}

Time = 5hrs

Joanna's journey was 5hrs long.

Question

Scott cycles at 4mph and covers a distance of 13\,miles.

How long does his journey take?

Triangle illustrating time equals distance over speed.

Time = \frac{{Distance}}{{Speed}}

Time = \frac{{13}}{4}

Time = 3.25hrs

But we don't write 3.25\,hours. The answer should be in hours and minutes.

So the answer is 3hrs\,15\,mins.

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