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

To determine how many tanks of fuel you will need to drive 1500 km, we can break down the problem into two main steps:

1. **Calculate the total amount of petrol needed to drive 1500 km**:
   \[
   \text{Total petrol needed} = \left(\frac{9 \text{ litres}}{100 \text{ km}}\right) \times 1500 \text{ km} = \frac{9 \times 1500}{100} = 135 \text{ litres}
   \]

2. **Calculate how many tanks of petrol are required**:
   \[
   \text{Number of tanks} = \frac{\text{Total petrol needed}}{\text{Tank capacity}} = \frac{135 \text{ litres}}{68 \text{ litres/tank}} \approx 1.985 \text{ tanks}
   \]

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

Would you like more details on this calculation, or do you have any questions?

Here are 5 related questions for further exploration:

1. How much petrol would you need for a 2000 km journey?
2. What if your car's petrol consumption increased to 10 litres/100 km?
3. How far could you drive with a full tank of petrol?
4. How many litres of petrol would be left after driving 1500 km?
5. What if the petrol tank could only hold 50 litres instead of 68?

**Tip:** Always round up to the next whole number when calculating the number of fuel tanks needed for a journey to ensure you have enough fuel.

Learn how to calculate the number of fuel tanks required to drive 1500 km with a car consuming 9 litres per 100 km. Detailed step-by-step solution including ratio calculations and unit conversions. Suitable for Grades 6-8.

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