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 determine how many tanks of fuel you'll need to drive 1,500 km, follow these steps:

1. **Calculate the fuel consumption for 1,500 km:**

   - Fuel consumption rate: 9 litres/100 km.
   - Distance to be driven: 1,500 km.

   First, find out how many litres are needed for 1,500 km:

   \[
   \text{Litres needed} = \left(\frac{9 \text{ litres}}{100 \text{ km}}\right) \times 1500 \text{ km} = 135 \text{ litres}
   \]

2. **Determine the number of tanks required:**

   - Tank capacity: 68 litres.
   - Total fuel needed: 135 litres.

   Now, divide the total fuel needed by the tank capacity to find out how many full tanks are required:

   \[
   \text{Number of tanks} = \frac{135 \text{ litres}}{68 \text{ litres/tank}} \approx 1.985 \text{ tanks}
   \]

   Since you can't use a fraction of a tank, you'll need **2 tanks** of fuel to cover the 1,500 km.

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Would you like more details or have any questions about this solution? Here are some related questions:

1. How many kilometres can you drive on one full tank of fuel?
2. If the fuel efficiency improves to 8 litres/100 km, how many tanks would be needed for 1,500 km?
3. What distance could you cover with 1 full tank if the efficiency is 10 litres/100 km?
4. How much fuel would be required to drive 2,000 km with the given efficiency?
5. How many litres would remain in the tank after driving 500 km?

**Tip:** Always round up the number of tanks since you can't have a fraction of a tank when refueling for long trips.

Learn how to calculate how many tanks of fuel you'll need to drive 1500km when your car consumes 9 litres per 100 km and your fuel tank holds 68 litres. This step-by-step guide explains fuel consumption calculations and the number of tanks required. Suitable for middle school students.

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