What is the absolute contribution of wind and solar energy to electricity…
2012
What is the absolute contribution of wind and solar energy to electricity generation?
Answer: A. 6.79 GW — ConceptA percentage expresses a part as a fraction of 100. If a category contributes p% of a total T, its absolute contribution is (p/100) × T.…
- A.
6.79 GW
- B.
19.4 GW
- C.
9.7 GW
- D.
29.1 GW
Show answer & explanation
Correct answer: A
Concept
A percentage expresses a part as a fraction of 100.
If a category contributes p% of a total T, its absolute contribution is (p/100) × T.
Application
From the pie chart, wind and solar energy account for 7% of the total, and the total generation is 97 GW.
Substitute p = 7 and T = 97 GW: (7/100) × 97 GW = 679/100 GW.
Therefore, the absolute contribution is 6.79 GW.
Cross-check
One percent of 97 GW is 0.97 GW; seven such parts give 7 × 0.97 = 6.79 GW, confirming the result.
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