GATE_AE_2027_MOCK_04_Q10
GATE 2027 Aerospace Engineering All-India Master Mock 04 (Aerospace Structures, Thin-Walled Beams & Aeroelasticity)
NAT · 2 Marks
General Aptitude • Analytical & Spatial Aptitude • Arithmetic & Numerical Estimation
A cylindrical satellite bus has diameter D = 2.0 m and height H = 3.0 m. What is its total surface area (in m^2) including both flat circular ends? (Take pi ≈ 3.1416, round off to two decimal places).
Answer Key:
25.13
Step-by-Step Verified Solution
### Solution: Radius r = 1.0 m. End areas = 2 * (pi * r^2) = 2 * 3.1416 * 1 = 6.2832 m^2. Curved area = 2 * pi * r * H = 2 * 3.1416 * 1 * 3 = 18.8496 m^2. Total area = 6.2832 + 18.8496 = 25.1328 ≈ 25.13 m^2. Correct: 25.13 (range 25.0 to 25.3).