xljoshlx16
xljoshlx16
02-07-2018
Mathematics
contestada
i need help with a problem help pls
Respuesta :
emilyfeng
emilyfeng
02-07-2018
2 π x 3 x 7 + π x 3^2 x2= 60 π= 188
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tramserran
tramserran
02-07-2018
There are 2 circular bases: A = π r²
A = π (3)²
= 9 π
There is one lateral face that is a rectangle: A = L x W
In this instance, the length equals the perimeter of the circle: L = 2 π r
A = 2 π (3) x 7
= 42 π
Surface Area = 2(9 π) + 42 π
= 18 π + 42 π
= 60 π
≈ 188
Answer: D
Answer Link
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