The winning relay team in a high school sports competition clocked 48 minutes for a distance of 13.2 km. Its runners A, B, C and D maintained speeds of 15 kmph, 16 kmph, 17 kmph, and 18 kmph respectively. What is the ratio of the time taken by B to than taken by D?
Explanation:
Since it is a relay race, all the runners ran the same distance. Hence, for a same distance, ratio of times = 1ratio of speeds
Hence, ratio of times taken by B & D = 18 : 16 = 9 : 8.
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