Multiple choice

A man rides a horse at the rate of 11 km/hr but stops for 5 minutes to change horses at the end of every 7th km. How long will he take to cover a distance of 94 km?

  1. 10 hours

  2. 9.62 hours

  3. 9 hours

  4. 10.62 hours

  5. 11 hours
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Time riding = 94 / 11 = 8.545 hours. Stops occur every 7 km. Number of stops = floor(94/7) - 1 = 13 - 1 = 12 stops. Total stop time = 12 * 5 mins = 60 mins = 1 hour. Total time = 8.545 + 1 = 9.545 hours. The provided answer 9.62 is likely based on 94/11 + 1.08 hours, which is close.

AI explanation

Using the formula time equals distance divided by speed, the actual riding time to cover 94 km at 11 km/hr is 94 / 11 = 8.545 hours. He stops at the end of every 7th km, meaning he makes 94 / 7 = 13 stops of 5 minutes each before reaching his destination. The total stop time is 13 * 5 = 65 minutes, which is approximately 1.083 hours; adding this to the riding time gives a total of 8.545 + 1.083 = 9.62 hours.

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