Q15 of 50 Page 164

The following table shows causes of noise pollution. Show it by a pie diagram.

Let us find the measures of central angles and show them in a table.

Know that,




Now we shall show the table into a pie chart.



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13

The following table shows the average rainfall in 150 towns. Show the information by a frequency polygon.

 14

Observe the adjacent pie diagram. It shows the percentages of number of vehicles passing a signal in a town between 8 am and 10 am

(1) Find the central angle for each type of vehicle.


(2) If the number of two-wheelers is 1200, find the number of all vehicles.


 16

A survey of students was made to know which game they like. The data obtained in the survey is presented in the adjacent pie diagram. If the total number of students are 1000,

(1) How many students like cricket?


(2) How many students like football?


(3) How many students prefer other games?


 17

Medical check up of 180 women was conducted in a health centre in a village. 50 of them were short of haemoglobin, 10 suffered from cataract and 25 had respiratory disorders. The remaining women were healthy. Show the information by a pie diagram.