Decorative fence

The rectangular garden is 57 m long and 42 m wide. Calculate how much m² it will reduce if it encloses with a 60 cm wide decorative fence.

Correct answer:

S =  117.36 m2

Step-by-step explanation:

a=57 m b=42 m p=60 cm m=60/100  m=0.6 m  S1=a b=57 42=2394 m2 S2=(a2 p) (b2 p)=(572 0.6) (422 0.6)=5691625=2276.64 m2  S=S1S2=23942276.64=293425=293425 m2=117.36 m2

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