Multiple choice

Somesh and Kashish, starting from the same point, walk at rates of 6 kmph and 6.5 kmph respectively. How much time will they take to be 9.5 km apart, if they walk in the same direction?

  1. 20 hours

  2. 19 hours

  3. 10 hours

  4. 4.75 hours

  5. 2.75 hours
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

When moving in the same direction, the relative speed is 6.5 - 6 = 0.5 kmph. Time = distance / relative speed = 9.5 / 0.5 = 19 hours.

AI explanation

When two objects move in the same direction, their relative speed is the difference between their individual speeds, giving a relative speed of 6.5 kmph minus 6 kmph, which equals 0.5 kmph. The time required to create a gap of 9.5 km is calculated by dividing the target distance by the relative speed, so 9.5 km divided by 0.5 kmph equals 19 hours. They will take 19 hours to be 9.5 km apart.

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