Correct Answer: Option B

Explanation

P_T = (5 x 50) + (100 x 4)

= 650watts

Energy(kWhr) = 650 x 10^-3 x 10

= 6.5 kWhr

1kWhr cost 2 kobo ; 6.5 kWhr will cost \(\frac{2 \times 6.5}{1}\)

= 13 kobo

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