Teaching KVS PRT (Latest Pattern) Mock Test Quantitative Aptitude Number System LCM and HCF

6 persons running around a ground complete one round in 6, 10, 12, 18, 30 and 40 minutes respectively. After how much time will they meet for the first time if they started running at the same time?

1

6 hours

2

5 hours

3

4.5 hours

4

4 hours

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