D is the distance between two towns velocity of both the buses is assumed to be same relative velocity of buses, v-20 km/hr in the direction of cyclist v+20 km/hr in the opp direction
applying in distance/velocity is time we get the two equations we get distance D & velocity
D/v-20=18/60 -- i D/v+20=6/60 --ii =>v=40 km/hr and D=6 km T = 6/40 hr = 9 mins hence ans is 40km/hr & 9mins respectively
Moderation Team
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