How many more squares of side 1 cm must be added to the given figure to form a square of side 5 cm?
 
A 9 
B 11 
C 20 
D 25
figures in the question shouldn't be so unclear.
 How many more squares of side 1 cm must be added to the given figure to form a square of side 5 cm?
 
A 9 
B 11 
C 20 
D 25