waecmaths question:
A train moving at uniform speed, covers 36km in 21 minutes. How long does it take to cover 60km
Option A:
35 minutes
Option B:
40 minutes
Option C:
45 minutes
Option D:
90 minutes
waecmaths solution:
$\begin{align} & 36km\to 21\min \\ & 60km=\frac{21\times 60}{36}\min =35\min \\\end{align}$
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