Time And Distance

A and B are traveling from a distance X and Y. A starts at 12p.m at a speed of 6km/hr and B starts at 1.30p.m at a speed of 8km/hr. At what time will be the 3 km ahead of A.
a) 3p.m
b) 4.30p.m
c) 6p.m
d) 7.30p.m

sol> 

A start 12 pm 6+6+6+6+3 = 27 km cover at 4:30
B start 1 :30 4+8+8+4 =24 km at 4 30...