Rectangular 80436

The longer dimension of the rectangular plot was reduced by one-fifth, and the shorter dimension by 8%. By what percentage did the amount of land decrease? What is the perimeter of the fence now if the original dimensions of the fence were 60m and 25m?

Correct answer:

p =  26.4 %
o2 =  142 m

Step-by-step explanation:

a=60 m b=25 m  r=100%8%=11008=0.92  x=aa/5=6060/5=48 m y=b r=25 0.92=23 m  S1=a b=60 25=1500 m2 S2=x y=48 23=1104 m2  p=100 S1S1S2=100 150015001104=26.4%
o2=2 (x+y)=2 (48+23)=142 m



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