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
Correct Answer: Option D
Explanation
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