Railways
RRB (Assistant Loco Pilot & Technician) Solved Paper-2 (2013)
question_answer
Samantha, Jessica and Roseline begin to jog around a circular stadium. They complete their revolutions in 84 s, 56 s and 63 s respectively. After how many seconds will they be together at the starting point?
A) 336
B) 504
C) 252
D) Cannot be determined
Correct Answer:
B
Solution :
\[\therefore \] LCM \[=2\times 2\times 2\times 3\times 3\times 7=504\] Hence, they will meat after 504 s.