Multiple choice

A man rides at the rate of 18 km/hr, but stops for 6 min. to change horses at the end of every 7th km. finds the time he will take to cover a distance of 90 km.

  1. 6 hrs.

  2. 6 hrs. 18 min

  3. 6 hrs. 12 min

  4. 6 hrs. 24 min
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The rider covers 90 km at 18 km/hr, taking 5 hours of riding time (90/18 = 5). There are 12 complete segments of 7 km each (7 × 12 = 84 km) with 6 km remaining. The rider stops after every 7th km, which means 12 stops of 6 minutes each, totaling 72 minutes (1 hour 12 minutes). Total time = 5 hours + 1 hour 12 minutes = 6 hours 12 minutes.

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