Answer:
Approximately 16228 billion kilowatt-hours of electricity will be produced.
Explanation:
According to the statement, yearly energy production is directly proportional to amount of carbon to be burnt. Then, we proceed to estimate the yearly energy production from worldwide coal consumption ([tex]E[/tex]), in kilowatt-hours, by simple rule of three:
[tex]E = 10\times 10^{9}\,kWh\times \frac{7.7\times 10^{9}\,ton}{4.745\times 10^{6}\,ton}[/tex]
[tex]E = 16228\times 10^{9}\,kWh[/tex]
Approximately 16228 billion kilowatt-hours of electricity will be produced.