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 use to drive 1500 km, we can follow these steps:

1. **Fuel consumption rate**: The car uses 9 litres of petrol per 100 km.
2. **Total distance**: You plan to drive 1500 km.
3. **Tank capacity**: The petrol tank holds 68 litres.

### Step-by-Step Calculation:

1. **Calculate total fuel required**:
   - If the car uses 9 litres per 100 km, for 1500 km, the total fuel needed is:
   \[
   \text{Fuel required} = \frac{9 \, \text{litres}}{100 \, \text{km}} \times 1500 \, \text{km} = 135 \, \text{litres}.
   \]

2. **Calculate the number of tanks needed**:
   - Each tank holds 68 litres, so the number of tanks needed is:
   \[
   \text{Number of tanks} = \frac{135 \, \text{litres}}{68 \, \text{litres per tank}} \approx 1.99.
   \]
   Since you can't use part of a tank, you'll need **2 full tanks** of petrol to drive 1500 km.

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Would you like more details on any of the steps?

Here are 5 related questions for further exploration:
1. How far can you drive with just one full tank of petrol?
2. What would your petrol consumption be if your car was more fuel-efficient, say 6 litres per 100 km?
3. How much petrol would you need to drive 2000 km?
4. If petrol costs €1.50 per litre, what will the total fuel cost be for a 1500 km trip?
5. How would the required tanks change if your car's tank held 55 litres instead of 68?

**Tip**: Always round up when calculating fuel tanks to ensure you have enough for the entire trip!

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

Learn how to calculate the number of tanks of fuel needed to drive 1500 km. This problem covers key concepts in ratio and proportion, unit conversion, and fuel efficiency calculations. Ideal for students in Grades 6-8, this guide provides a step-by-step solution to determine fuel usage.

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