Răspuns :
b=> 180:20=9coloane |___|___|___|___|___|___|___|___| 9x20=180b
f=> 160:20=8 coloane |___|___|___|___|___|___|___| 8x20=160f
------------------------------- -----------------------
180+160=340copii 17x20=340copii
R=>17 coloane
f=> 160:20=8 coloane |___|___|___|___|___|___|___| 8x20=160f
------------------------------- -----------------------
180+160=340copii 17x20=340copii
R=>17 coloane