The question can be answered directly by exploiting one of the given conditions in our question which is, the width must have a minimum of 3.2 meters.
For the LOGO 1 we have a with of 12 cm, with the scale 1 cm = 0.4 meters. Therefore our real with is;
Width 1 = 12 cm (0.4 m / 1 cm) = 4.8 m , therefore it satisfy our condition that it must have a minimum width of 3.2 meters.
while;
For the LOGO 2, we have a width of 10 cm with the scale 1 cm = 0.3 meters. Therefore our real width is;
Width 2 = 10 cm (0.3 m / 1 cm) = 3 m, making the width of our LOGO 2 not enough for our condition that the width must have a minimum of 3.2 meters.
By that alone only LOGO 1 meets the building requirements of our logo, making LOGO 1 as our answer.