The surface area of a cone with circumference base of 24π inches and slant height of 20 inches is 384π inches² in terms of π.
surface area = πr(r + l)
where
Therefore,
l = 20 inches
24Ï€ = 2Ï€r
r = 12
Therefore,
surface area  = π(12)(12 + 20)
surface area = 12Ï€(12 + 20)
surface area = 12π × 32
surface area = 384π inches²
learn more on surface area here: https://brainly.com/question/2847956
Answer:
B)  384 π square inches
Step-by-step explanation:
E2020
