Question
At the same time A and B start moving towards each other
from two different places, 240 km apart. The ratio of the speeds of A and B is 5: 7, and the speed of B is 84 km/h. After how many minutes will A and B meet each other?Solution
Ratio of Speeds of A and B =5:7 Speed of A and B=5x and 7x ATQ- 7x =84km/h x =12 Then Speed of A=5×12=60km/h. Relatives speed of A and B =84+60=144. So, now time taken by A and B meet each other=240/144 
Simplify:
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