Respuesta :
Answer:
Yes
Step-by-step explanation:
We will assume that each bulb is of 100 kW (kilowatt).
We will calculate how much energy in kilowatt-hours the light bulb will use per year in kilowatts, by the number of hours in a year.
We have,
100 kW = 0.1 kW so the energy consumed in one year is,
[tex]0.1 \times 8760=876.0\text {kWh}[/tex]
Since there are 8760 hours in one year.
It is given that there are 9 bulbs so we need to have,
[tex]876 \times 9 = 7884 \text {kWh}[/tex]
It is given that 1 ton of coal produces 2460 kWh, so 4 tons of coal will produce,
[tex]4\times 2460= 9840 \text {kWh}[/tex]
We can observe that 4 tons of coal is producing 9840 kWh which is mroe than 7884 kWh. So, yes, 4 tons of coal can produce enough power to light 9 bulbs for a year.
