Multiple choice

A car goes from A to B in three hours. It stays at B for five hours and then returns to A. If the total time taken in the journey including the stay at B be 12 hrs and the average running speed of the car be 60 km/hr., how far is B from A?

  1. 210 km

  2. 360 km

  3. 420 km

  4. 720 km

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

Total time is 12 hours, stay is 5 hours, so travel time is 7 hours. Let distance be d. Total distance is 2d. Average speed = Total distance / Total running time. 60 = 2d / 7, so 2d = 420, d = 210 km.