Q202
Four people are running around a circular ground from a point on the circumference at 9.00 am. For one round, these four persons take respectively 40, 50, 60 and 30 minutes. At what time will they meet together again ?
A.
4.30 pm
B.
7.00 pm
AnswerC.
6.00 pm
D.
5.30 pm
Answer: Option B
Solution
Answer: Option B
Solution:
L.C.M. of 40, 50, 60 and 30 = 600 minutes
= 10 hours
So, they meet again 10 hours after they start
i.e., 7.00 pm