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'll follow these steps:

1. **Calculate the total fuel consumption for 1500 km**:
   - The car uses 9 litres per 100 km.
   - For 1500 km:
     \[
     \text{Fuel Consumption} = \frac{9 \text{ litres}}{100 \text{ km}} \times 1500 \text{ km} = 135 \text{ litres}
     \]

2. **Calculate how many tanks of fuel are required**:
   - The tank holds 68 litres.
   - To find the number of tanks needed:
     \[
     \text{Number of Tanks} = \frac{135 \text{ litres}}{68 \text{ litres/tank}} \approx 1.985 \text{ tanks}
     \]

Since you can't use a fraction of a tank, you'll need **2 tanks** of fuel to complete the 1500 km journey.

Would you like more details or have any questions? 

Here are some related questions:

1. How would the number of tanks change if the fuel efficiency improved to 8 litres/100 km?
2. How many kilometres can you drive on a full tank with the current fuel efficiency?
3. What is the cost of the journey if fuel costs $1.50 per litre?
4. How much fuel is left after completing 1500 km with 2 full tanks?
5. What would the fuel consumption be for a shorter trip, say 750 km?

**Tip:** It's useful to know your car's fuel efficiency in different driving conditions, as this can impact your fuel consumption significantly.

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 fuel tanks required for a 1500 km journey with a car that uses 9 litres per 100 km and has a tank capacity of 68 litres. This problem covers essential mathematical concepts like ratio and unit conversion, ideal for students in Grades 6-8.

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