20% is 1/5 more so it is 1 1/5 times the size of the smaller one. 1 1/5 is 1.2 as a decimal (also 120% divided by 100).
Let's take the smaller bottle to be y.
x=1.2y
x=1.2*5.4=6.48 ounces.
Answer:
opposite sides with equal length
hope it helps
c i think because they dont specify
