Multiple choice

An athlete has to cover a distance of 18 km in 45 minutes. If he covers half of the distance in 1/3rd of the total time, what should be his speed (km/hr.) to cover the remaining distance in time ?

  1. 15 km/h.

  2. 12 km/h

  3. 9 km/h.

  4. 18 km/h.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Total distance = 18 km, total time = 45 min (0.75 hr). Half distance = 9 km, 1/3 time = 15 min (0.25 hr). Remaining distance = 9 km, remaining time = 30 min (0.5 hr). Speed = 9 / 0.5 = 18 km/h.

AI explanation

The total time allowed is 45 minutes, so one-third of this time is 15 minutes (0.25 hours). The remaining distance is half of 18 km, which is 9 km, and the remaining time is 30 minutes (0.5 hours). Using the formula Speed equals Distance divided by Time, the required speed is 9 km divided by 0.5 hours, which equals 18 km/h.

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