state gov MP Forest Guard and Jail Prahari Mock Test 2023 Quantitative Aptitude Number System LCM and HCF
There are three street lights which get on for one second after 30 s, 40 s and 50 s, respectively. If last time they were on simultaneously at 04:00 PM. At what time after 04:00 PM all of them get on again simultaneously?
1
04:10 PM
2
04:11 PM
3
04:12 PM
4
04:14 PM