Question

Raman travels 150 km at an average speed of 25 km/hr and return back to same at the average speed of 20 km/hr. Find the average speed of Raman?

1. 22.22 km/hr
2. 11.11 km/hr
3. 33.33 km/hr
4. 9.09 km/hr

Answer 1

Correct Answer - Option 1 : 22.22 km/hr

Given:

Raman travel 150 km with the average speed of 25 km/hr and return back to same with the average speed of 20 km/hr

Formula used/Concept Used:

Here the distance is same

∴ Average speed = (2xy/x + y)

Where x and y are the speeds

Calculation:

Average speed = (2 × 20 × 25/(45)) = 22.22 km/hr

∴ The average speed of Raman is 22.22 km/hr