Multiple choice

A car runs at a speed of $40$ km/hr when not serviced and runs at $60$ km/hr when serviced. After servicing the car covers a certain distance in $5$ hours. How much time will the car take to cover the same distance when not serviced?

  1. $8$ hours
  2. $7.5$ hours
  3. $6$ hours
  4. $7$ hours
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Distance = speed * time = 60 * 5 = 300 km. Time when not serviced = distance / speed = 300 / 40 = 7.5 hours.

AI explanation

Using the formula distance equals speed multiplied by time, the distance covered by the serviced car in 5 hours is 60 km/hr multiplied by 5 hours, yielding 300 km. To find the time taken by the unserviced car, use the formula time equals distance divided by speed. The required time is 300 km divided by 40 km/hr, which equals 7.5 hours.

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