Question

The following table shows the daily supply of electricity to different places in a town. To show the information by a pie diagram, measures of central angles of sectors are to be decided.
Complete the following activity to find the measure :

Places	Supply of electricity  (Thousand units)	Measure of central angle
Roads	4	`4/30 xx 360 = 48^circ`
Factories	12	`square/square xx 360 = 144^circ`
shops	6	`6/30 xx 360 = square`
Houses	8	`square/square xx 360 = square`
Total ⇒	30	`square`

Answer 1

Places	Supply of electricity  (Thousand units)	Measure of central angle
Roads	4	`4/30 xx 360 = 48^circ`
Factories	12	`bb12/bb30 xx 360 = 144^circ`
shops	6	`6/30 xx 360 = bb(72^circ)`
Houses	8	`bb8/bb30 xx 360 = bb(96^circ)`
Total ⇒	30	`bb(360^circ)`