Answers

2015-05-04T01:54:27+05:30

This Is a Certified Answer

×
Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
         A               C                         B
we assume that Ramesh and Dinesh travel with their constant speeds.


they meet at C  after time T.
Speed of Ramesh = AC/T                                speed of Dinesh = BC/T

Ramesh travels CB in 4 hrs                             Dinesh travels CA in 1 hr
speed = CB/4                                                 speed = CA/1

total distance AB
total time duration for Ramesh = T+4 hrs            for Dinesh = T+1 hr
avg Speed of Ramesh = AB/(T+4)                      for  Dinesh :  AB / (T+1)

Ratio of their avg speeds = (T+1) / (T+4)

average speeds of Ramesh and Dinesh for the two legs of travel:

AC/T = CB/4 = (AB-AC)/4                                      BC/T= CA
=>  T = 4 AC/(AB - AC)                               T = BC / CA= (AB-AC) / CA

=> T * T = 4    => T = 2 hrs          by multiplying the above two expressions

substituting the value of T, we get 
=>  BC = 2 CA        and     AB = 3 CA

Ramesh:  Avg speed = AC/2 = AB/6 = BC/4
Dinesh:  Avg speed = CA/1 = AB/3 = BC/2

Ratio of average speeds = (T+1)/(T+4) = 3/6 = 1/2

1 5 1
please click on thanks azur blue button above
thankz
please click on thanks azur blue button above