General Science Physics Work Power Energy

କୌଣସି ଷ୍ଟିମ୍ ଇଞ୍ଜିନ୍ ମିନିଟ୍ ପ୍ରତି 5.4 x 108 J କାର୍ଯ୍ୟ କରେ, ଏହାର ଉତ୍ସରୁ 3.6 x 109 J ତାପ ନେଇ । ଇଞ୍ଜିନ୍ର ଦକ୍ଷତା କେତେ?

1
15%
2
12.5%
3
85%
4
87.5%

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