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 will be used to drive 1500 km, we can break the problem into two steps.

### Step 1: Calculate the total fuel consumption for 1500 km.
The car uses **9 litres per 100 km**, so for 1500 km, the fuel usage is:

\[
\text{Fuel consumption} = \left( \frac{9 \, \text{litres}}{100 \, \text{km}} \right) \times 1500 \, \text{km} = 135 \, \text{litres}
\]

### Step 2: Determine how many tanks of fuel are needed.
Each tank holds **68 litres**, so the number of tanks required is:

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

Since you can't use a fraction of a tank in practice, you'll need **2 full tanks** of fuel to cover 1500 km.

Would you like more details or have any other questions?

Here are 5 related questions to expand on the topic:
1. How much fuel would you need for a 2000 km trip?
2. What is the fuel consumption per km, given the 9 litres/100 km?
3. How far can you drive on a single tank of fuel?
4. How would the fuel consumption change if the car's efficiency improved to 7 litres/100 km?
5. How many tanks would you need for a 3000 km journey?

**Tip:** Always round up the number of fuel tanks, as partial tanks aren't practical for long trips.

Find out how to calculate the number of fuel tanks needed for a 1500 km journey with a car that uses 9 litres per 100 km and has a tank capacity of 68 litres. Step-by-step solution provided, suitable for students in Grades 5-7.

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