waecmaths question:
A train travel 60km in M minutes, If its average speed is 400 km per hour, find the value of M
Option A:
15
Option B:
12
Option C:
10
Option D:
9
waecmaths solution:
$\begin{align} & Speed=\frac{Distance}{Time} \\ & 400=\frac{60}{T} \\ & T=\frac{60}{400}hr\to \frac{60}{400}\times 60=9\min \\\end{align}$
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