343.32N
233.33N
333.33N
334.33N
Correct answer is C
\(\frac{MA}{VR}\times\frac{100}{1}=efficiency\)
\(\frac{L}{E}\frac{1}{VR}\times\frac{100}{1}=75\)
\(\frac{1000}{E}\frac{1}{4}\times\frac{100}{1}=75\)
\(E = \frac{250 \times 100}{75}\)
E = 333.3N
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