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romanna [79]
3 years ago
8

find the total surface area of a cone if its stant height is 21 metre and diameter of its base is 24 metre​

Social Studies
1 answer:
malfutka [58]3 years ago
6 0

Explanation:

A=πrl+πr2

=22/7×12×21+22/7×12^2

=(792+452.57)sq.metre

=1244.57 sq.metre

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