Fountain

The stone fountain, which has the shape of a cylinder with a diameter of 3 m, is 70 cm deep. How many m2 of stone is wetted with water?

Correct result:

S =  13.666 m2

Solution:

D=3 m h=70 cm→m=70/100 m=0.7 m  r=D/2=3/2=32=1.5 m  S1=π⋅ r2=3.1416⋅ 1.52≐7.0686 m2 S2=π⋅ D⋅ h=3.1416⋅ 3⋅ 0.7≐6.5973 m2  S=S1+S2=7.0686+6.5973=13.666 m2

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