Question

Following data relate to the construction of a house in Delhi. Present the information in the form of a pie diagram:

Items	Labour	Bricks	Cement	Steel	Timber	Supervision
Percentage Expenditure	25	15	20	15	10	15

Answer 1

The percentage values are converted into degree values using the following formula.
$\mathrm{Degree}\mathrm{value}=\frac{\mathrm{Component}\mathrm{value}}{100}\times 360$

Items	Percentage Share	Degree Share
Labour	25	$\mathrm{Degree}\mathrm{share}\mathrm{of}\mathrm{Labour}=\frac{25}{100}\times 360=90°$
Bricks	15	$\mathrm{Degree}\mathrm{share}\mathrm{of}\hspace{0.17em}\mathrm{Bricks}=\frac{15}{100}\times 360=54°$
Cement	20	$\mathrm{Degree}\mathrm{share}\mathrm{of}\hspace{0.17em}\mathrm{Cement}=\frac{20}{100}\times 360=72°$
Steel	15	$\mathrm{Degree}\mathrm{share}\mathrm{of}\hspace{0.17em}\mathrm{Steel}=\frac{15}{100}\times 360=54°$
Timber	10	$\mathrm{Degree}\mathrm{share}\mathrm{of}\hspace{0.17em}\mathrm{Timber}=\frac{10}{100}\times 360=36°$
Supervision	15	$\mathrm{Degree}\mathrm{share}\mathrm{of}\hspace{0.17em}\mathrm{Supervision}=\frac{15}{100}\times 360=54°$