Question

In a tree plantation programme, the number of trees planted by students of different classes is given in the following table. Draw a pie diagram showing the information.

Standard	5th	6th	7th	8th	9th	10th
No. of trees	40	50	75	50	70	75

Answer 1

The measures of central angles are given in the table.

Age group (Yrs)	No. of. trees	Central Angle
5th	40	\[\frac{40}{360} \times 360 = 40^\circ\]
6th	50	\[\frac{50}{360} \times 360 = 50^\circ\]
7th	75	\[\frac{75}{360} \times 360 = 75^\circ\]
8th	50	\[\frac{50}{360} \times 360 = 50^\circ\]
9th	70	\[\frac{70}{360} \times 360 = 70^\circ\]
10th	75	\[\frac{75}{360} \times 360 = 75^\circ\]
Total	360

The pie diagram showing the above data is given below: