The tank-full petrol in Arun's motor-cycle lasts for 10 days. If he starts using 25% more everyday, how many days will the tank-full petrol last?

- 5
- 6
- 7
- 8

### Answer

Assume 100 litres of petrol in bike.

So, for 10 days, 10 litres is required daily.

Now using 25% more everyday means 12.5 litres of petrol.

100/12.5 = 8

**The correct option is D.**