Question

A man covers a distance from town A to town B on a scooter at 30 kmph and rides back from B to A at 20 kmph. His average speed is
1. 24 kmph
2. 30 kmph
3. 18 kmph
4. None of these

Answer 1

Correct Answer - Option 1 : 24 kmph

Given:

Scooter speed from A to B = 30 kmph

Scooter speed from B to A = 20 kmph 

Formula used:

Average speed = (2xy)/(x+y)

x & y are the speed of the scooter

Calculation:

Average speed = (2xy)/(x+y)

Substituting the values in the formula

⇒ Avg speed = (2 × 30 × 20)/(30 + 20)

⇒ Avg speed = 1200/50 = 24 kmph

∴ The average speed is 24 kmph