Two bicycle riders A and B ride in the opposite directions around a circular track, starting at the same time from the same point. The speed of A is 3 km/hr and that of B is 1 km/hr. If the track has a perimeter of 4 km, after how much time will the two cyclists meet?

2 hrs

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3 hrs

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1 hr

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None of these

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Solution

The correct option is C
1 hr

Recall the relative speed concept here, as they are riding in the opposite direction, relative speed = 3+1 =4 km/hr

Distance to be covered = perimeter of circular track = 4 km

As, Time = Distance/ Speed

Here the time taken= $\frac{4 k m}{4 k m / h r} = 1 h r$

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Two bicycle riders A and B ride in the opposite directions around a circular track, starting at the same time from the same point. The speed of A is 3 km/hr and that of B is 1 km/hr. If the track has a perimeter of 4 km, after how much time will the two cyclists meet?

The correct option is C 1 hr Recall the relative speed concept here, as they are riding in the opposite direction, relative speed = 3+1 =4 km/hr Distance to be covered = perimeter of circular track = 4 km As, Time = Distance/ Speed Here the time taken= 4 km4 km/hr = 1 hr

The correct option is C
1 hr

Recall the relative speed concept here, as they are riding in the opposite direction, relative speed = 3+1 =4 km/hr

Distance to be covered = perimeter of circular track = 4 km

As, Time = Distance/ Speed

Here the time taken= $\frac{4 k m}{4 k m / h r} = 1 h r$