Metal sheets

How much metal sheet is needed to produce 8 gutters 4 m long and 12 cm in diameter? During production, joints calculate at 3% of total consumption.

Correct answer:

A =  6.2128 m2

Step-by-step explanation:

D=12 cm m=12:100  m=0.12 m r=D/2=0.12/2=503=0.06 m l=8 4=32 m  S1=π D l=3.1416 0.12 3212.0637 m2  q=3%=1+1003=1.03  A=S1/2 q=12.0637/2 1.03=6.2128 m2

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