A, B and C start at the same time in the same direction to run around a circular stadium. A completes a round in 252 seconds, B in 308 seconds and c in 198 seconds, all starting at the same point. After what time will they again at the starting point ?
A. 26 minutes and 18 seconds
B. 42 minutes and 36 seconds
C. 45 minutes
D. 46 minutes and 12 seconds
E. None of these
Solution (By Examveda Team)
A complete his round in 252 seconds.
B completes his round in 308 seconds.
C completes his round in 198 seconds.
They will agian at starting together after,
LCM of 252, 308 and 198.
252 = 2 *2 *3*3*7
308 = 2 *2*7*11
198 = 2 *3*3*11
Required LCM = 2*2*3*3*7*11 = 2772 seconds = 46 minutes 12 seconds.
This Question Belongs to User Ask Question >> Miscellaneous
Pls clarify answer 2772÷60.it will be 46.1
How answe is 46min12seconds??
Option d) as by Examveda Team Solution Is Right.
b