Garden

Rectangular garden has a length 99 m and width 84 m. Calculate how many m2 will decrease its area if land by ornamental fence with width 30 cm.

Correct result:

S =  109.44 m2

Solution:

a=99 m b=84 m h=30 cm→ m=30/100  m=0.3 m  S1=a⋅ b=99⋅ 84=8316 m2 S2=(a−2⋅ h)⋅ (b−2⋅ h)=(99−2⋅ 0.3)⋅ (84−2⋅ 0.3)=8206.56 m2  S=S1−S2=8316−8206.56=273625=273625 m2=109.44 m2

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