Two guns A and B can fire bullets at speeds 1 km/s and 2 km/s respectively. From a point on a horizontal bround, they are fired in all possible directions. The ratio of maximum areas covered by the bullets fired by the two guns, on the ground is :
(1) 1 : 16
(2) 1 : 2
(3) 1 : 4
(4) 1 : 8
