A) Rs 350
B) Rs 358
C) Rs 375
D) Rs 397
Correct Answer: B
Solution :
If a motor of 12 HP works for 10 days at the rate of 8 h/day then Energy consumption \[=power\times time\] \[=12\times 746\frac{J}{s}\times (80\times 60\times 60)s\] \[=12\times 746\times 80\times 60\times 60J\] \[=2.5\times {{10}^{9}}J\] Rate of energy \[=50\frac{Paise}{kWh}\] \[\because \]\[3.6\times {{10}^{6}}J\] energy cost = Rs 0.5 \[\therefore \] \[2.5\times {{10}^{9}}\text{ }J\] energy cost \[=\frac{2.5\times {{10}^{9}}}{2\times 3.6\times {{10}^{6}}}\] \[=Rs358\]
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