Half-cylinder 9961

The water feeding trough for cattle has the shape of a half-cylinder with a length of 2 m and a width of 0.8 m. How many m3 of water can be poured into the gutter? How many m2 do we need to produce 25 such gutters?

Correct answer:

V1 =  0.5027 m3
S =  62.8319 m2

Step-by-step explanation:

l=2 m D=0.8 m  r=D/2=0.8/2=52=0.4 m V1=21 π r2 l=21 3.1416 0.42 2=0.5027 m3
n=25 S1=π r l=3.1416 0.4 22.5133 m2  S=n S1=25 2.5133=62.8319 m2

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