a)cilindro:
At= 2 x pi x 2x(7+2)
=2x(3.14 aprox.) x2(9)
=2x(3.14)x18
=113.04 cm aprox.
b)cono.
At= pi x3x(4+3)
=(3.14 aprox) x 3(7)
=(3.14) x21
=65.94 cm aprox
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a)cilindro:
At= 2 x pi x 2x(7+2)
=2x(3.14 aprox.) x2(9)
=2x(3.14)x18
=113.04 cm aprox.
b)cono.
At= pi x3x(4+3)
=(3.14 aprox) x 3(7)
=(3.14) x21
=65.94 cm aprox