Answer:
68.04
Step-by-step explanation:
(a) 1km
(b)80 fence panels
(a) perimeter = 300+300= 600
200+200= + 400
=1000m
1km = 1000m
(b).
1panel = 2.5 m 1× 200÷2.5 = 80
=200m
300 ÷ 15 = D
D=20