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Question 103
A train travels at an average speed of 70 kmph and covers a distance of 140 km. The train travels the first 80 km at a speed of 60 kmph. Then the speed (in kmph) during the next 60 km is
Solution
Time for which train was travelling = 140/70 = 2 hours
Time for which the train needed to cover 80 km = 80/60 = 4/3 hours
Hence, remaining time = 2 - (4/3) = 2/3 hour
Speed for the remaining 60 km = 60/(2/3) = 90 kmph
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