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 1500 km, we can break the problem into steps:

1. **Calculate fuel consumption per 1500 km**:
   - You use 9 litres for every 100 km.
   - For 1500 km, the fuel consumption will be:
   \[
   \text{Fuel consumption} = \frac{9 \times 1500}{100} = 135 \, \text{litres}
   \]

2. **Determine how many tanks of fuel are needed**:
   - Your car’s fuel tank holds 68 litres.
   - The number of tanks of fuel you’ll need is:
   \[
   \text{Number of tanks} = \frac{135}{68} \approx 1.985 \, \text{tanks}
   \]
   - Since you can't use a fraction of a tank, you'll need to round up to 2 tanks.

So, you'll need **2 full tanks of fuel** to drive 1500 km.

Would you like further details or have any questions?

Here are 5 related questions you might find useful:
1. How much fuel would you need for 2000 km?
2. What if your fuel efficiency improved to 8 litres / 100 km?
3. How much would the total fuel cost if petrol costs $1.50 per litre?
4. What distance can you travel on half a tank of fuel?
5. How would the calculation change if the fuel tank held 50 litres?

**Tip**: Improving your car's fuel efficiency, like reducing speed or regular maintenance, can help you save fuel over long distances.

Learn how to calculate fuel usage for 1500 km when your car consumes 9 litres per 100 km and the tank holds 68 litres. This guide walks you through key concepts of ratio, proportion, and fuel consumption calculations. Ideal for students in Grades 6-8.

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