Cylinder surface area

Volume of a cylinder whose height is equal to the radius of the base is 678.5 dm3. Calculate its surface area.

Correct result:

S =  452.352 dm2

Solution:

V=678.5 h=r V=πr2 h=πr3 r=V/π3=678.5/3.141635.9998 h=r=5.99985.9998 S=2π r2+2π r h=2 3.1416 5.99982+2 3.1416 5.9998 5.9998=452.352 dm2



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