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Find the surface area. Leave your answers in terms of π.A. 229.5π mi²B. 143.2π mi²C. 207.2π mi²D. 542.4π mi²

Find The Surface Area Leave Your Answers In Terms Of ΠA 2295π MiB 1432π MiC 2072π MiD 5424π Mi class=

Sagot :

The surface area of a cone is found by

SA =π r^2 +π rl where r is the radius and l is the slant height

We know the diameter is 16 so we can find the radius by dividing the diameter in half

r = d/2 = 16/2 = 8

We know the slant height is 17.9

SA = π ( 8) ^2 + π ( 8) 17.9

= 64 π + 143.2π

=207.2π mi^2

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