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Q.
Two persons start running simultaneously around a circular track of length 600 m from the same point at speeds of 25 kmph and 35 kmph. When will they meet for the first time any where on the track ?
A.
54 sec
B.
36 sec
C.
72 sec
D.
11 sec
View Answer
Correct choice: B
Explanation:
Time taken to meet the first time = length of track/relative speed Given the length of the track is 600 m The relative speed = 25 + 35 = 60 kmph = 60 x 5/18 m Therefore Time = 600/(25+35) 5/18= 600/60 x (18/5) = 36 sec.
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