Multiple choice

A car can finish a certain journey in $10$ hours at the speed of $48$ km/hr. In order to cover the same distance in $8$ hours, the speed of the car must be increased by

  1. $6$ km/hr
  2. $7.5$ km/hr
  3. $12$ km/hr
  4. $15$ km/hr
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Distance = 10 * 48 = 480 km. New speed = 480 / 8 = 60 km/hr. Increase = 60 - 48 = 12 km/hr.

AI explanation

Using the formula distance equals speed multiplied by time, the total distance of the journey is 10 hours multiplied by 48 km/hr, giving 480 km. To cover this 480 km distance in 8 hours, the required speed is 480 divided by 8, which equals 60 km/hr. The initial speed was 48 km/hr, so the required speed increase is 60 minus 48, resulting in 12 km/hr.

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