Answer:
38.84
Explanation:
19 L of petrol cost £24.70
We can write this proportion as:
19 L / £24.70 = 30 L / x
Where x represents the cost of 30 L of petrol.
To solve for x, we can cross multiply and then divide:
(19 L)(x) = (30 L)(£24.70)
19x = 30 * 24.70
Now, we can solve for x:
x = (30 * 24.70) / 19
x ≈ £38.84
Therefore, 30 L of petrol will cost approximately £38.84.