Question

Electricity used by farmers during different parts of a day for irrigation is shown below. Draw a pie diagram to represent the data.

Part of the day	Morning	Afternoon	Evening	Night
Percentage of electricity used	30	40	20	10

Answer 1

First, we will compute the central angle for each part of the day, as shown in the following table.

Sr. No.	Part of the day	Percentage of electricity used	Measure of central angle
1	Morning	30	$\frac{30}{100}\times 360°=108°$
2	Afternoon	40	$\frac{40}{100}\times 360°=144°$
3	Evening	20	$\frac{20}{100}\times 360°=72°$
4	Night	10	$\frac{10}{100}\times 360°=36°$
	Total	100	360o