Question on: WAEC Mathematics - 2008
A train travels 60km in M minutes. If its average speed is 400km per hour, find the value of M
A
15
B
12
C
10
D
9
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Correct Option: D
Average speed = \(\frac{Distance}{Time}\)
\(\frac{400km}{hr} = \frac{60km}{Time}\)
Time = \(\frac{60km}{400 km/hr}\)
= \(\frac{60hr}{400}\)
M = \(\frac{60hr}{400} \times \frac{60min}{1hr}\)
= 9 minutes
\(\frac{400km}{hr} = \frac{60km}{Time}\)
Time = \(\frac{60km}{400 km/hr}\)
= \(\frac{60hr}{400}\)
M = \(\frac{60hr}{400} \times \frac{60min}{1hr}\)
= 9 minutes
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