Multiple choice

A man is traveling by car at the rate of $40$ km/hr. After every $80$ km, he rests for $20$ min. How long will he take to cover a distance of $240$ km?

  1. $6$ hr $40$ min
  2. $6$ hr
  3. $6$ hr $20$ min
  4. $7$ hr
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A Correct answer
Explanation

Driving time = 240 km / 40 km/h = 6 hours. The car rests after 80 km and 160 km (2 rests). Total rest time = 2 * 20 min = 40 min. Total time = 6 hours 40 minutes.

AI explanation

Using the formula Time = Distance / Speed, the driving time for 240 km at 40 km/hr is 6 hours. The number of 80 km intervals in 240 km is 3, meaning he rests twice after the first and second intervals to exclude the final destination. The total rest time is 40 minutes (2 times 20 min), so the total time taken is 6 hr 40 min.

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