Answer:
10 cm
Explanation:
Area = length × width
80 = length × 8
length = 10
The length is 10 cm
The area is given by length times width
A = l*w
We have an area of 80 cm^2 and a width of 8
80 = l*8
Divide each side by 8
80/8 = 8l/8
10 = l
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