The tank-full petrol in Arun's motor-cycle lasts for 10 days

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?

1. 5
2. 6
3. 7
4. 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.