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A train without stoppage travels with an average speed of 80 km/h and with stoppage, it travels with an average speed of 64 km/h. For how many minutes does the train stop on an average per hour?
Answer & Solution
Correct Answer:
Option
A
$$\eqalign{
& \left( {\frac{{{\text{Faster speed}} - {\text{Slower speed}}}}{{{\text{Faster speed}}}} \times 60} \right){\text{min/hr}} \cr
& = \frac{{80 - 64}}{{80}} \times 60 \cr
& = \frac{{16}}{{80}} \times 60 \cr
& = 12{\text{ min}} \cr} $$
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