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 19 kmph, 20 kmph, 21 kmph, and 22 kmph respectively. What is the ratio of the time taken by B to than taken by D?  Select the correct option:
A) 11:10
B) 5:17
C) 9:8
D) 8:9
E) None of these
Explanation :   Since it is a relay race, all the runners ran the same distance.   Hence for a same distance, (ratio of times) = 1/(ratio of speeds).   Hence ratio of times taken by B t&amp; D = 22 : 20 = 11 : 10.   11:10nswer : 11:10
<result>A</result>
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 19 kmph, 20 kmph, 21 kmph, and 22 kmph respectively. What is the ratio of the time taken by B to than taken by D?