A video shooter uses five 60W lamps and four 100W lamp for an average of 2hours per day. If the cost of running the project per day is Tsh 27per unit. What will be the running cost in four days?

Answer 1

To calculate the running cost for the video shooter using five 60W lamps and four 100W lamps for an average of 2 hours per day, we can follow these steps:

1. Calculate Total wattage:

   • Total wattage for 60W lamps: \( 5 \text{ lamps} \times 60 \text{ W/lamp} = 300 \text{ W} \)
   • Total wattage for 100W lamps: \( 4 \text{ lamps} \times 100 \text{ W/lamp} = 400 \text{ W} \)
   • Total wattage for all lamps: \( 300 \text{ W} + 400 \text{ W} = 700 \text{ W} \)

2. Convert to kilowatts:

   • Total wattage in kilowatts: \( 700 \text{ W} = 0.7 \text{ kW} \)

3. Calculate daily energy consumption:

   • Daily energy consumption (in kWh): \( 0.7 \text{ kW} \times 2 \text{ hours} = 1.4 \text{ kWh/day} \)

4. Calculate total energy consumption over four days:

   • Total for four days: \( 1.4 \text{ kWh/day} \times 4 \text{ days} = 5.6 \text{ kWh} \)

5. Calculate the running cost:

   • Cost of running per unit (1 kWh) = Tsh 27
   • Total cost: \( 5.6 \text{ kWh} \times 27 \text{ Tsh/kWh} = 151.2 \text{ Tsh} \)

Thus, the running cost in four days will be Tsh 151.2.