Multiple choice

G drives a car at the speed of 16 km/h, but stops for 8 minutes to take rest at the end of every 23 km. The time that he will take to cover a distance of 128 km is

  1. 8 h 40 min

  2. 9 h 20 min

  3. 6 h 40 min

  4. 8 h
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Travel time = 128 / 16 = 8 hours. Number of stops = 128 / 23 = 5.56, so 5 stops. Total rest time = 5 * 8 = 40 minutes. Total time = 8 hours 40 minutes.

AI explanation

The total time taken is the driving time plus the total rest time. Using the formula time equals distance divided by speed, the driving time is 128 divided by 16, which equals 8 hours. To find the number of rest stops, divide 128 by 23, which gives 5 complete stops of 8 minutes each, adding 40 minutes to the journey. The total time is therefore 8 hours and 40 minutes.

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