Weekly wages of 250 workers in a factory are given in the following table. Construct the histogram and frequency polygon on the same graph for the data given.

Ages of 60 teachers in primary schools of a Mandal are given in the following frequency distribution table. Construct the Frequency polygon and frequency curve for the data without using the histogram. (Use separate graph sheets)

The area of histogram of a data and its frequency polygon are same. Reason how.

Obsere the data given in the following table. How do the above reasons lead pollution ?

Obsere the data given in the following table. How do you think weeds are more in the lake ?

Obsere the data given in the following table. What are th reasons for decrease in lake area ?

Obsere the data given in the following table. How was the threat to the lake due to pollution discovered ?

Construct the triangle with the measurement given in the following table .

Obsere the data given in the following table. What could be the reasons for the migration of birds to this lake ?

Obsere the data given in the following table. In which year lake - water spread are is more ? Why ?

Read the following table and answer the questions given below. What does the above table tell us?