Calculate 4842

The area of the rotating cylinder shell is half the area of its surface. Calculate the surface of the cylinder if you know that the diagonal of the axial section is 5 cm.

Correct answer:

S =  62.8319 cm2

Step-by-step explanation:

u=5 S1=S/2 S1=π D h u2=h2+D2 S1=2 S2 S2=π (D/2)2 2h=D u2=h2+(2h)2 52=5 h2 h=52/5=52.2361 D=2 h=2 2.2361=2 54.4721 S1=π D h=3.1416 4.4721 2.236131.4159 S2=π (D/2)2=3.1416 (4.4721/2)215.708  S=S1+2 S2=31.4159+2 15.708=62.8319 cm2

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