A large number of 1.5-in.-OD pipes carrying hot and cold liquids are embedded in concrete in an equilateral staggered arrangement with center line 4.5 in. apart as shown in the sketch. If the pipes in rows A and C are at 60?F while the pipes in rows B and D are at 150?F, determine the rate of heat transfer per foot length from pipe X in row B.GIVENA large number of pipes embedded in concrete as shown belowOutside diameter of pipes (D) = 1.5 in.The temperature of the pipes in rows A and C = 60?FThe temperature of the pipes in rows B and D = 150?FASSUMPTIONSSteady state, two dimensional heat transferUniform thermal conductivity in theconcrete

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+3 In.+ Row A: 60°F Row B: 150°F 4.5 h. 4.5 In. Row C: 60°F 4.5 In. Row D: 150°F