Walls (excluding roofs and floors) of 5 identical rooms having a length, breadth and height 6 m, 4 m and 2.5 m respectively are to be painted. Out of five rooms, two rooms have one square window each having a side of 2.5 m. Paints are available only in cans of 1 litre, and 1 litre of paint can be used for painting 20 square metres. The number of cans required for painting is

Walls (excluding roofs and floors) of 5 identical rooms having a lengt

1.	Walls (excluding roofs and floors) of 5 identical rooms having a length, breadth and height 6 m, 4 m and 2.5 m respectively are to be painted. Out of five rooms, two rooms have one square window each having a side of 2.5 m. Paints are available only in cans of 1 litre, and 1 litre of paint can be used for painting 20 square metres. The number of cans required for painting is
A.	10
B.	12
C.	13
D.	14
Answer» C. 13