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Papessa [141]
3 years ago
11

Help someone please...

Mathematics
1 answer:
zalisa [80]3 years ago
6 0

Answer:

303

Step-by-step explanation:

Surface area of cone is =\pi r^{2} +\pi rl , where l is the slant height.

Therefore the area of cone = 3.14 \times( 9^{2}) +(3.14 \times9\times20)

                                             =302.6

round off to nearest whole number, 303

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