Direction: The pie- chart given below shows the usage of materials in the construction of a house. Study the chart and answers the questions :
![](/content-resources/content-images/instruction/2751_instruction_image.jpg)
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The average of percentages of steel, cement and miscellaneous items used in the construction is :
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- 10%
- 25%
- 20%
- 35%
Correct Option: C
On the basis of given pie chart in question ,
Sum of the corresponding angles for steel, cement and miscellaneous items = (36° + 72° + 108°) = 216°
∵ 360° ≡ 100%
∴ 1° = | 360 |
∴ 216° ≡ | × 216 = 60% | 360 |
∴ Required average = 60 ÷ 3 = 20%