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MPSC State Service 2020 · GS · Question 53 of 97

A washing machine rated 300 Watt is operated for one hour/day. If the cost of one unit is ₹ 3.00, what will be the cost of the energy to operate a washing machine for the month of March?

Physics

  1. A₹ 279.00
  2. B₹ 31.00
  3. C₹ 27.00
  4. D₹ 27.90Correct

Answer: D. ₹ 27.90

Explanation

Energy = 0.3 kW x 1 h x 31 days = 9.3 units; at Rs 3 per unit the cost is Rs 27.90.

Source: MPSC Rajyaseva Prelims 2020 – GS Paper I (Set D), official paper

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