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# Explanation

### Explanatory Answer

Let the speed of the bike and auto be 5s and s respectively

Given, their meeting point (point p) is 15 km from Varanasi.

Let the bike stops at d km from point p.

- 15/s = 15/5s + d/5s + d/s (while returning to point p the speed reduced by 80 %)
- d = 10 km

Given, 2 hours later R parked the bike

=> (15 + d)/5s = 2 [ d = 10 km]

=> s = 2.5 km/hour