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4 years ago

Can someone please help me I would appreciate it please!?!

Mathematics

1 answer:

Annette [7]4 years ago

4 0

The answer is: " 471 cm² " .
_____________________________________________________
The formula for the surface area, "S.A.", of a "cylinder":

S.A. = 2 π r² + 2 π r h ;

in which:

"S.A." = "surface area" of the cylinder; for which we wish to solve;

π = 3.14 (approximation we shall use) ;

r = radius = 5 cm (given; from figure);

h = height = 2 cm (given; from figure);
______________________________________
To solve for the surface area, "S.A." . let us plug in our known values, and solve:

S.A. = 2 π r² + 2 π r h ;

S.A. = 2 * (3.14) * (5 cm)² + 2 * (3.14) * (5 cm) * 10 cm) ;

= 2 * (3.14) * (5²) * (cm²) + 2 * (3.14) * 5* 10 * cm² ;

= 2 * (3.14) * (25) * (cm²) + 2 * (3.14) * 5* 10 * cm² ;

= 157 cm² + 314 cm² ;

= 471 cm² .
________________________________________________
The answer is: " 471 cm² " .
________________________________________________

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