Direction: The pie- chart given below shows the usage of materials in the construction of a house. Study the chart and answers the questions :
-
The average of percentages of steel, cement and miscellaneous items used in the construction is :
-
- 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%
