Multiple choice

A cyclist travels at a speed of 12 km/hr and took a rest of 3.5 mins after every 1 km. How much time will he take in minutes if he needs to cover 10 km ?

  1. 81.5 mins

  2. 85 mins

  3. 76.5 mins

  4. 80 mins

  5. 72.5 mins
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Travel time for 10 km at 12 km/hr is (10/12)*60 = 50 minutes. He rests 3.5 minutes after every 1 km, so he rests 9 times (at 1, 2, ..., 9 km). Total rest time = 9 * 3.5 = 31.5 minutes. Total time = 50 + 31.5 = 81.5 minutes.

AI explanation

At a speed of 12 km/hr, the cyclist takes 60/12 = 5 minutes to cover each kilometer. For a 10 km journey, the actual cycling time is 10 multiplied by 5, which equals 50 minutes. He takes a 3.5 minute rest after each of the first 9 kilometers, totaling 9 multiplied by 3.5 = 31.5 minutes of rest, so the total time is 50 + 31.5 = 81.5 minutes.

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