Your car petrol usage is 9 litres / 100 km. Your tank holds 68 litres. How many tanks of fuel will you use to drive 1500km?

To solve this problem, we need to calculate how many liters of fuel you will need to drive 1500 km, then determine how many tanks that equals.

1. **Fuel consumption for 1500 km**:
   Your car uses 9 liters per 100 km. First, let's calculate the fuel needed for 1500 km:
   \[
   \text{Fuel consumption} = \left( \frac{9 \, \text{liters}}{100 \, \text{km}} \right) \times 1500 \, \text{km} = 135 \, \text{liters}
   \]

2. **Number of tanks needed**:
   Your car's tank holds 68 liters. To find how many full tanks you need:
   \[
   \text{Number of tanks} = \frac{135 \, \text{liters}}{68 \, \text{liters per tank}} \approx 1.985
   \]

You will need approximately 2 full tanks of fuel to drive 1500 km.

Would you like any further details on this solution?

Here are 5 related questions you might find useful:
1. How much fuel will be left in the second tank after the 1500 km?
2. How many kilometers can you drive with one full tank?
3. If your fuel consumption improved to 8 liters per 100 km, how many tanks would you need for the same distance?
4. How would the calculation change if the journey was 2000 km instead of 1500 km?
5. How much will the fuel cost for the trip if petrol costs $1.50 per liter?

**Tip:** Always check fuel efficiency and tank capacity before a long trip to avoid running out of fuel.

Discover how to calculate the number of fuel tanks needed for a 1500 km journey when your car consumes 9 litres per 100 km and has a tank capacity of 68 litres. This practical math problem covers proportions and basic arithmetic, perfect for students in Grades 6-8.

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