Multiple choice

Two men starting from the same place walk at the rate of 5kmph and 5.5 kmph respectively. What time will they take to be 8.5 km apart, if they walk in the same direction?

  1. 4hr 15 min

  2. 8hr 30 min

  3. 16 hrs

  4. 17 hrs
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Relative speed = 5.5 - 5 = 0.5 kmph. Time = Distance / Relative Speed = 8.5 / 0.5 = 17 hours.

AI explanation

When two objects move in the same direction, their relative speed is the difference between their individual speeds, which is 5.5 kmph minus 5 kmph, equaling 0.5 kmph. To find the time it takes for them to be 8.5 km apart, we divide the total distance by the relative speed using the formula Time equals Distance divided by Speed. This gives 8.5 divided by 0.5, which results in 17 hours.

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