Management Aptitude Test Sep 2013 Paper

Question : 87 of 200

Marks: +1, -0

A, B and C are running on a circular track of 120 m at a speed of 5 m/s, 8 m/s and 10 m/s respectively. A, B and C all three are moving in the same direction. When will all the three meet again at the starting point ?

After 55 s
After 2 min
After 5 min
After 40 s

Validate

Solution:

(b) Time taken by A to complete one round,

{\Distance} / {\Speed}=120/5

= 24 s
Similarly, time taken by B =

120/8

= 15 s
Time taken by C =

120/10

= 12s
Time taken or the time after which all meet at a starting point.
= LCM of 24 s, 15 s and 12 s

2	24,15,12
2	12,15,6
2	6,15,3
3	3,15,3
	1,5,1

= 2 x 2 x 2 x 3 x 5 = 120 s = 2 min

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