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Module DEMO-32-89DEMO-C-32

Surface Area of a Cone

DEMO-C-32 • Programming in C

Browser-only practice

Problem Statement

Calculate the total surface area of a cone given radius r and height h.

Formula: PI * r * (r + sqrt(h^2 + r^2)).

Target difficulty: Medium

Constraints

r, h > 0

Input Format

Two numbers: r and h.

Output Format

Surface area formatted to 2 decimal places.

Sample Testcases

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Sample #1
Public sample
Input
3.0 4.0
Output
75.40
Explanation
PI * 3.0 * (3.0 + sqrt(4.0^2 + 3.0^2)) = 75.40
Sample #2
Public sample
Input
5.0 12.0
Output
282.74
Explanation
PI * 5.0 * (5.0 + sqrt(12.0^2 + 5.0^2)) = 282.74
Sample #3
Public sample
Input
2.0 5.0
Output
46.40
Explanation
PI * 2.0 * (2.0 + sqrt(5.0^2 + 2.0^2)) = 46.40
Sample #4
Public sample
Input
0.5 1.0
Output
2.54
Explanation
PI * 0.5 * (0.5 + sqrt(1.0^2 + 0.5^2)) = 2.54

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