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 calculate how many tanks of fuel you'll need to drive 1500 km, follow these steps:

1. **Determine how much fuel is required for 1500 km**:  
   Your car uses 9 litres per 100 km. So, for 1500 km:
   \[
   \frac{9 \text{ litres}}{100 \text{ km}} \times 1500 \text{ km} = 135 \text{ litres}
   \]

2. **Calculate how many tanks you'll need**:  
   Since your tank holds 68 litres, divide the total fuel needed by the tank capacity:
   \[
   \frac{135 \text{ litres}}{68 \text{ litres/tank}} \approx 1.985 \text{ tanks}
   \]

   This means you'll need about **2 full tanks** to drive 1500 km.

Would you like more details or have any questions?

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Here are 5 related questions to consider:
1. How many kilometers can you drive on one full tank of fuel?
2. If your fuel efficiency improves to 8 litres/100 km, how many tanks will you need for 1500 km?
3. How much would it cost to drive 1500 km if fuel costs $1.50 per litre?
4. How many kilometers can you drive with half a tank of fuel?
5. If you only had 50 litres in your tank, how far could you drive?

**Tip**: Knowing your car's fuel efficiency can help you plan trips and manage fuel costs effectively!

Learn how to calculate the number of fuel tanks needed to drive 1500 km when your car uses 9 litres of petrol per 100 km and the tank holds 68 litres. This problem involves simple division, proportions, and unit conversion, perfect for students in Grades 5-7.

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