| Philip, Tom and Brad start jogging around a circular field and complete a single round in 18, 22 and 30 s, respectively. In how much time will they meet again at the starting point? [Indian Bank (PO) 2011] |
A) 8 min 15 s
B) 21 min
C) 16 min 30 s
D) 12 min
E) None of these
Correct Answer: C
Solution :
| Required time = LCM of 18, 22 and 30 s |
| \[=990\,\,s=\frac{990}{60}\min =16\min 30\,\,s\] |
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