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An express train travelled at an average speed of 100 km/hr, stopping for 3 minutes after every 75 km. How long did it take to reach its destination 600 km from the starting point ?
Answer & Solution
Correct Answer:
Option
A
Time taken to cover 600 km
$$\eqalign{ & = \left( {\frac{{600}}{{100}}} \right)hr \cr & = 6hrs \cr} $$
Number of stoppages
$$\eqalign{ & = \frac{{600}}{{75}} - 1 \cr & = 7 \cr} $$
Total time of stoppages
= (3 × 7) min
= 21 min
Hence, total time taken = 6 hrs 21 min
$$\eqalign{ & = \left( {\frac{{600}}{{100}}} \right)hr \cr & = 6hrs \cr} $$
Number of stoppages
$$\eqalign{ & = \frac{{600}}{{75}} - 1 \cr & = 7 \cr} $$
Total time of stoppages
= (3 × 7) min
= 21 min
Hence, total time taken = 6 hrs 21 min
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