An electricity meter shows at the beginning of a month and at the end

PHYSICS · Single correct · CBSE · Physics · Current Electricity · Current Electricity

Problem

5. An electricity meter shows 12486 kWh12486\,\text{kWh} at the beginning of a month and 12736 kWh12736\,\text{kWh} at the end. Two tariff plans are available: Plan A: Flat rate Rs 6 per unit (kWh) Plan B: Rs 5.50 per unit for the first 200 units and Rs 7 per unit for any additional units. Which plan is cheaper for that month, and by how much? (a) Plan B, cheaper by Rs 50\text{Plan B, cheaper by }Rs\,50 (b) Plan A, cheaper by Rs 50\text{Plan A, cheaper by }Rs\,50 (c) Plan B, cheaper by Rs 125\text{Plan B, cheaper by }Rs\,125 (d) Plan B, cheaper by Rs 100\text{Plan B, cheaper by }Rs\,100

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