Ram wants to paint all the walls and ceiling of his reading room personally. He started painting his room and after painting the area of 16 $$m^{2}$$, a paint tin of 4 litres is exhausted. How many paint tins are required to paint the remaining area, if the total area of his room to be painted is 176 $$m^{2}$$?

A

10

B

30

C

20

D

40