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The pipe bend of Fig. P3.121 has D1 = 27 cm and D2 = 13 cm. When water at 20°C flows through the pipe at

The pipe bend of Fig. P3.121 has D1 = 27 cm and D2 = 13 cm. When water at 20°C flows through the pipe at 4000 gal/ min, p1 = 194 kPa (gage). Compute the torque required at point B to hold the bend stationary.

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