Problem

Two particles are moving along two long straight lines, in the same plane with same speed equal to

20 \text{ cm/s}

. The angle between the two lines is

60^\circ

and their intersection point is

O

. At a certain moment, the two particles are located at distances 3m and 4m from

O

and are moving towards

O

. Subsequently, the shortest distance between them will be a. 50 cm b.

40\sqrt{2} \text{ cm}

50\sqrt{2} \text{ cm}

50\sqrt{3} \text{ cm}