Answer:
12
Step-by-step explanation:
Please see attachment
160 metres per minute
800 / 5 = 160
18m x 4 = 72m
Walkway = 72 meters.
Perimeter = side 1 + side 2 ´+ side 3.
Triangle 1
Perimeter = 6 + 8 + 10
= 24
Triangle 2
Perimeter = 9 + 12 + 15
= 36
Ratio
24/36 = 2/3
The ratio of the perimeters is also 2/3
