Mathematics · Percentages and Efficiency
A coal-fired thermal power plant has an efficiency of 35%. The electricity from this power plant is used entirely for lighting purposes with an average lighting efficiency of 20%. What is the overall efficiency of conversion from coal to lighting?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 10.07✓
- 20.70
- 30.55
- 40.15
Correct answer
0.07
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