Wind at 20°C and 1 atm blows at 75 km/h past a flagpole18 m high and 20 cm in diameter. The drag coefficient,based on the frontal area, is 1.15. Estimate the wind-inducedbending moment at the base of the pole.(a) 9.7 kN . m, (b) 15.2 kN . m, (c) 19.4 kN . m, (d) 30.5 kN . m,(e) 61.0 kN . m

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