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Calculate the cost of operating a heater of 500 W for 20 hrs at rate of Rs 3.90 per unit. What is ' per unit' please solve it sir / ma'am. |
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Answer» Calculate the cost of operating a heater of 500 W for 20 hrs at rate of Rs 3.90 per unit. What is ' per unit' please solve it sir / ma'am. |
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