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, let's break it down:

1. **Fuel consumption rate**: 9 litres per 100 km.
2. **Tank capacity**: 68 litres.
3. **Total distance to drive**: 1500 km.

First, calculate how many litres of petrol are required to drive 1500 km:

\[
\text{Litres required} = \left( \frac{9}{100} \right) \times 1500 = 135 \text{ litres}
\]

Next, calculate how many tanks of fuel are needed to cover 135 litres:

\[
\text{Tanks of fuel} = \frac{135}{68} \approx 1.99
\]

Since you can't use a fraction of a tank, you'll need **2 full tanks** of fuel.

Would you like more details or have any questions?

Here are 5 related questions for further practice:
1. How much distance can you cover with a full tank of petrol?
2. How many litres would you need to drive 500 km?
3. If your fuel consumption improves to 7 litres/100 km, how many tanks will you need for 1500 km?
4. How much would it cost to drive 1500 km if petrol costs $1.50 per litre?
5. How many litres would you save if you reduced your consumption to 8 litres/100 km?

**Tip**: Always round up when calculating fuel tanks, since you can't drive on a partial tank!

Learn how to calculate the number of fuel tanks needed to drive 1500 km based on a car's fuel consumption rate of 9 litres per 100 km and a tank capacity of 68 litres. This problem teaches unit conversion and proportion calculations, suitable for students in Grades 5-7.

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