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Q.
A runs 1 2/3 times as fast as B. If A gives B a start of 80 m, how far must the winning post be so that A and B might reach it at the same time?
A.
200 m
B.
300m
C.
270m
D.
160m
View Answer
Correct choice: A
Explanation:
Ratio of the speeds of A and B =5 : 1 = 5 :3 Thus, in race of 5 m, A gains 2 m over B. 2 m are gained by A in a race of 5 m. 80 m will be gained by A in race of (52*80)52*80 m =200m => Winning post is 200 m away from the starting point.
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