Multiple choice

A car takes $4$ hours to cover a distance, if it travels at a speed of $40$ mph. What should be its speed to cover the same distance in $1.5$ hours?

  1. $80$ mph
  2. $106.66$ mph
  3. $120.87$ mph
  4. $140.54$ mph
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Distance = 4 hours * 40 mph = 160 miles. New speed = 160 miles / 1.5 hours = 106.66 mph.

AI explanation

Using the formula for constant distance, speed is inversely proportional to time, so the required speed equals 40 multiplied by 4 and divided by 1.5. This gives the calculation 160 divided by 1.5, which results in 106.66 mph.