SSC CPO 10 Nov 2022 Shift 2 Paper

Question : 144 of 200

Marks: +1, -0

Three persons P, Q, R run along a circular track at speeds of 3 km/h, 4 km/h, 6 km/h, respectively. If the length of the track is 36 km, then after how much time will they meet again at the starting point?