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Civil Engineering Building Materials Difficulty: Medium

An aircraft is flying in an atmosphere of 30°C with a speed of 1260 kmph. Its speed is known as If a solid shaft (diameter 20 cm, length 400 cm, N = 0.8 × 10 5 N/mm 2 ) when subjected to a twisting moment, produces maximum shear stress of 50 N/mm 2 , the angle of twist in radians, is The horizontal deflection of a parabolic curved beam of span 10 m and rise 3 m when loaded with a uniformly distributed load $$l$$ t per horizontal length, is (where $${I_{\text{c}}}$$ is the M.I. at the crown, which varies as the slope of the arch). For providing an Indian type W.C., the R.C.C. slabs in the toilet portion The cross-sectional area of 52 kg flat footed rail is