The distance between two places A and B is 245 km. TWo cars, one from A and the other from B, start at the same time, travelling towards each other. If one car travels at a speed of 40 km/h and the other at 30 km/h , after how many hours will they meet?
The distance between two places A and B is 245 km. TWo cars, one from A and the other from B, start at the same time, travelling towards each other. One car travels at a speed of 40 km/h and the other at 30 km/h.
$$Time = \frac{TotalĀ distanceĀ betweenĀ them}{RelativeĀ Speed}$$
$$=\frac{245}{30+40}$$ (+ done because both are travelling towards each other)
$$=\frac{245}{70}$$
$$=\frac{7}{2} = 3\frac{1}{2}$$
Option C is correct.
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