Lateral surface area L = π•radius• g
Here g = √(21^2 + 7^2)
. g = √441+ 49
. g = √500
. = 22.36
Then lateral surface L = π• 7 • 22.36
. L = π• 156.52
. L = 491.73
Then ANSWER IS
L = 491.7 feet2
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