Multiple choice

A certain distance is covered at the speed of 4 km./hr. in 2 hours 45 minutes. What is the time taken to cover the same distance at the speed of 12 km./hr.?

  1. 48 minutes

  2. 55 minutes

  3. 66 minutes

  4. 77 minutes

  5. None of these

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Speed = 4 km/hr, Time = 2 hr 45 min = 11/4 hr. Distance = 4 × 11/4 = 11 km. New speed = 12 km/hr. Time = 11/12 hr = 55 minutes. Option B is correct.