Physics
Grade-9
Easy

Question

A certain appliance requires 1,755 watts. How much would it cost to run the appliance for a total of 33 minutes at a cost of Rs10 per kWh?

  1. Rs 9.7
  2. Rs 9
  3. Rs 10
  4. Rs 10.3

hintHint:

Rs 9.7

The correct answer is: Rs 9.7


    Watts required=1755
    Time taken=33 mins
    Cost per kWh=Rs 10
    kWh = [watts × time(hrs)]/1000
    kWh = [1755 × (33/60)]/1000
    kWh = (1755 × 0.55)/1000
    kWh = 965.25/1000
    kWh = 0.96525
    Cost to run the appliance
    Rs = kWh × Cost per kWh
    Rs = 0.96525 × 10
    Rs = 9.6525

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