You are painting a wall that has a circular window as shown in the figure. You have enough paint to cover 70 sq ft of the wall. Do you need to certain buy more paint? Explain how you got your answer.

You want to buy a house. Would you like to buy a house having windows but no ventilators? Explain your answer.

Jane has to point a cylindrical column that is 14 feet high and that has a circular base with a radius of 3 feet. If one bucket of paint will cover 10pi square feet, how many whole buckets does jane need to buy in order to paint the column, including the top and bottom?

You want to buy a house.would you like to buy a hose having windows but no ventilators ?Explain your answer.

A white ancient painting has turned black over the years. What do you do to restore its original colour ?

Fresh milk has a pH of 6. How do you think the pH will change as it turns into curd ? Explain your answer.