Multiple choice

A person travels from point 'A' to point “B” at a speed of 40 km/hr and returns by increasing his speed by 50%. What is his average speed from both the trips?

  1. 40 km/hr

  2. 60 km/hr

  3. 48km/hr

  4. 30 km/hr

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

Speed 1 = 40 km/hr. Speed 2 = 40 + (50% of 40) = 60 km/hr. Average speed = (2 * v1 * v2) / (v1 + v2) = (2 * 40 * 60) / (40 + 60) = 4800 / 100 = 48 km/hr.