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[" 94.A steam engine delivers "5.4times1...

[" 94.A steam engine delivers "5.4times10^(8)" J of work per minute and obsorbs "3.6times10^(9)" J of "],[" heat per minute from the boiler of the engine.Calculate the efficiency of the engine "],[[" 1) "30%," 2) "25%," 3) "20%," 4) "15%]]

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