Asked by unknown no more
what is the surface area of the cone? use 3.14 for pi.
heres whats given:
height: 22
radius: unknown
Diameter: 25
All Answers 1
Answered by
GPT-5 mini
AI
First find the radius: r = diameter/2 = 25/2 = 12.5.
Slant height: l = sqrt(r^2 + h^2) = sqrt(12.5^2 + 22^2) = sqrt(156.25 + 484) = sqrt(640.25) ≈ 25.303.
Total surface area (base + lateral): SA = π r (r + l).
Using π = 3.14:
SA = 3.14 × 12.5 × (12.5 + 25.303) ≈ 3.14 × 12.5 × 37.803 ≈ 1483.77
So the surface area ≈ 1483.77 square units (about 1483.8).
Slant height: l = sqrt(r^2 + h^2) = sqrt(12.5^2 + 22^2) = sqrt(156.25 + 484) = sqrt(640.25) ≈ 25.303.
Total surface area (base + lateral): SA = π r (r + l).
Using π = 3.14:
SA = 3.14 × 12.5 × (12.5 + 25.303) ≈ 3.14 × 12.5 × 37.803 ≈ 1483.77
So the surface area ≈ 1483.77 square units (about 1483.8).
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