Question 34

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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: 

$\begin{align}  & Speed=\frac{Distance}{Time} \\ & 400=\frac{60}{T} \\ & T=\frac{60}{400}hr\to \frac{60}{400}\times 60=9\min  \\\end{align}$

maths year: