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 find out how many tanks of fuel you'll use to drive 1500 km, follow these steps:

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

2. **Determine how many tanks of fuel are required**:  
   Your tank holds 68 litres.  
   To find the number of tanks required, divide the total fuel needed by the tank capacity:
   \[
   \text{Number of tanks} = \frac{135}{68} \approx 1.985
   \]

Since you can't use a fraction of a tank, you'll need to round up.  
Thus, you will need **2 tanks of fuel** to cover 1500 km.

Would you like more details or have any questions?

Here are 5 related questions:
1. How much fuel would you save if your car used 7 litres/100 km instead?
2. How far could you drive on a single tank of fuel?
3. What is the total fuel cost if petrol is priced at $1.50 per litre for this trip?
4. How would the number of tanks change for a 2000 km journey?
5. How many kilometres could you drive if your fuel consumption increased to 10 litres/100 km?

**Tip**: Always round up the number of tanks needed to ensure you don't run out of fuel during your trip!

Learn how to calculate the number of fuel tanks required to drive 1500 km with a car that consumes 9 litres per 100 km and has a tank capacity of 68 litres. This problem covers key concepts such as unit conversion and proportional division. Suitable for Grades 5-7.

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