Numeracy question. 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?
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 calculate how many tanks of fuel are needed to drive 1500 km with a petrol usage of 9 litres per 100 km and a tank capacity of 68 litres, follow these steps:

### Step 1: Determine the total fuel consumption for 1500 km
Since the car uses 9 litres of petrol for every 100 km, the total fuel required for 1500 km is:
\[
\text{Fuel required} = \left( \frac{9 \text{ litres}}{100 \text{ km}} \right) \times 1500 \text{ km} = 135 \text{ litres}
\]

### 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 tanks of fuel** to cover 1500 km.

Would you like more details or have any questions?

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**Related Questions:**
1. How many litres would you need to drive 2000 km?
2. What is the cost of fuel for 1500 km if fuel costs $1.50 per litre?
3. How many kilometres can you drive with 1 full tank of 68 litres?
4. What is the fuel consumption in miles per gallon (mpg)?
5. How many kilometres can you drive if the petrol usage is reduced to 8 litres per 100 km?

**Tip:** Always round up the number of fuel tanks when driving long distances, as partial tanks won't be sufficient!

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?

Learn how to calculate the number of fuel tanks needed for a 1500 km drive with a car consuming 9 litres per 100 km and a tank capacity of 68 litres. This step-by-step guide covers key mathematical concepts like ratio, proportion, and rounding, making it suitable for Grades 5-7 students.

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