# Find His Average Speed For The Whole Journey In km/hr

A motorist travels to a place 150 km away at an average speed of 50 km/hr and returns at 30 km/hr. His average speed for the whole journey in km/hr is

- 37.5
- 37
- 35
- 40

**Answer: (1) 37.5**

**Explanation:-**

**Formula-**

**The average speed = 2XY/(X + Y) km/hr.**

Where, X – first speed & Y – Second speed.

Then,

The average speed = 2 x 50 x 30/(50 + 30)

= 3000/80

= 37.5 km/hr.

Hence, the answer is (1) 37.5