The terrace

Around the round pool with a diameter of 5.5 meters is a wooden terrace with a width of 130 cm. What is the area of the terrace?

Correct result:

S =  27.7717 m2


D=5.5 a=130/100=1310=1.3 r=D/2=5.5/2=114=2.75 S1=π r2=3.1416 2.75223.7583 S2=π (r+a)2=3.1416 (2.75+1.3)251.53 S=S2S1=51.5323.7583=27.7717 m2

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