The winning relay team in a high school sports competition clocked 48 min for a

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The winning relay team in a high school sports competition clocked 48 min for a distance of 13.2 km. Its runners A, B, C and D maintained speeds of 15 km/hr, 16 km/hr, 17 km/hr and 18 km/hr respectively. What is the ratio of the time taken by B to the time taken by D?

Options:

A . 5 : 16

B . 5 : 17

C . 9 : 8

D . 8 : 9

Answer: Option C
:
C
(c) Time is inversely proportional to the speed.
Hence ratio of time taken by B and D = 18 : 16 = 9 : 8

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