Answer: £210
Step-by-step explanation:
you do the cm they given you so if it’s 630cm x 120cm = 75,600
30cm x 30cm = 900cm
75,600 divided by 900 = 84
£2.50 x 84 = £210
D. You multiply all measurements together. The thickness has nothing to do with how much air will be inside. (: hope this helped ya :)