Multiple choice

Two cyclists A and B start from the same place at the same time. One goes towards north at 18 km/hr and the other goes towards south at 20 km/hr. How much time will they take to be 95 km apart?

  1. 4 hr and 30 min

  2. 4 hr and 45 min

  3. 5 hr and 16 min

  4. 2 hr and 30 min
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Since they move in opposite directions, their relative speed is 18 + 20 = 38 km/hr. Time = Distance / Speed = 95 / 38 = 2.5 hours, which is 2 hours and 30 minutes.

AI explanation

Since the cyclists start from the same place and move in opposite directions (north and south), their relative speed is the sum of their speeds: 18 km/hr + 20 km/hr = 38 km/hr. The time required to be 95 km apart is calculated by dividing the total distance by the relative speed. This gives 95 / 38 = 2.5 hours, which equals 2 hours and 30 minutes.

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