we start by calculating the value of x
152=x2+x2
225=2x2
225/2=x2
112.5=x2
112.5=x2
10.61=x
length x= 10.61m
next we find the diagonal D
length = 50−x=50−10.61=39.39
width =40−x=40−10.61=29.39
D=39.392+29.392
D=49.15
area of the road =15∗D
=15∗49.15
=737.25m2
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