Two persons A and B start at the same time in opposite directions from two points then after passing each other they complete the journey in a and b hours the ratio of speeds of A and B.

A man sets out to cycle from points P to Q and at the same time another man starts to cycle from points Q to P. After passing each other, they complete their journeys in 9 h and 4 h, respectively. Find the ratio of speeds of 1st man to that of 2nd man.

A and B start moving from a place X to Y and Y to X , respectively , at the same time on the same day . After crossing each other ,they complete their remaining joumeys in 5(4)/(9) hours and x hours ,respectively .If the ratio of the speeds (in km/h) of A and B is 9 :7 ,then what is the value of x ?

Two trains start at same time from A and B towards each other and after crossing they take a and b sec in reaching B and A then ratio of speeds of A and B.

Two trains A and B start simultaneously in the opposite direction from two points P and Q and arrive at their destinations 16 and 9 hours respectively after their meeting each other at what speed does the second train B travel if the first train travels at 120 km/h per hour:

Two trains A nad B start simultaneously in the opposite direction from two points P and Q and arrive at their destinations 16 and 9 hours respectively after their meeting each other. At what speed does the second train B travel if the first train travels at 120 km/h per hour :

Two points A and B are situated at the same distance from a source of light, but in opposite direction from it. The phase difference between the light waves passing through A and B will be :