Multiple choice

$A$ and $B$ are standing at place $P$. They start moving in the opposite directions at the speed of $5\ kmph$ and $4\ kmph$ respectively. What will be the distance between them after $3$ hours?

  1. $3\ km$
  2. $21\ km$
  3. $18\ km$
  4. $27\ km$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

When moving in opposite directions, the relative speed is the sum of the individual speeds: 5 + 4 = 9 kmph. In 3 hours, the distance covered is 9 kmph * 3 hours = 27 km.

AI explanation

Using the relative speed formula for objects moving in opposite directions, their relative speed is the sum of their individual speeds: 5 kmph plus 4 kmph equals 9 kmph. The total distance between them after 3 hours is calculated by multiplying this relative speed by the time, giving 9 kmph times 3 hours which equals 27 km. The result is 27 km.

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