Answer:
£0.70
Step-by-step explanation:
1 litre = 1000ml
Method 1:
[tex]\begin{array}{cccc}\£3.50&-&1000ml&\text{divide both sides by 5}\\\\\£0.70&-&200ml\end{array}[/tex]
Method 2:
[tex]\dfrac{\£3.50}{1000ml}=\dfrac{x}{200ml}\qquad\text{cross multiply}\\\\1000x=\£700\qquad\text{divide both sides by 1000}\\\\x=\dfrac{\£700}{1000}\\\\x=\£0.70[/tex]
