Multiple choice

Ratan travelled $300\ km$ in $20$ hours. He covered $3/5th$ of the distance in $2/5th$ of the time. At what speed did he cover the remaining distance ?

  1. $10$
  2. $12$
  3. $15$
  4. $71/2$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Distance covered = 3/5 * 300 = 180 km. Time taken = 2/5 * 20 = 8 hours. Remaining distance = 120 km. Remaining time = 12 hours. Speed = 120 / 12 = 10 km/h.

AI explanation

The remaining distance is calculated as 300 km multiplied by (1 - 3/5), which equals 120 km. The remaining time is 20 hours multiplied by (1 - 2/5), which equals 12 hours. Using Speed = Distance / Time, his speed for the remaining distance is 120 km / 12 hours = 10 km/hr.

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