Mr. Carter can paint 20 chairs in t hours. He uses 3 liters of paint for every 12 chairs that he
painted.


a) Find, in terms of t, the number of chairs that he can paint in 3 hours.

b) Find, in terms of t, the time taken by Mr. Carter to paint 7 chairs.

c) If t = 4, find the amount of paint Mr. Carter has used after painting for 4 hours