Trains A and B start moving at the same time from stations X and Y respectively towards each other on parallel tracks, Aftor passing each other, A and B take x hours and 8 hours to
roach Y and X, respectively. If the speed of B ls 25% more than that of A, then what is the value of ?
Answers
Given : Trains A and B start moving at the same time from stations X and Y , respectively towards each other on parallel tracks. After passing each other, A and B take x hours and 8 hours to reach Y and X, respectively.
speed of B is 25% more than that of A
To Find : what is the value of x?
Solution:
Let say Distance between Stations =180D km
Speed of A = 4A km/hr
speed of B is 25% more than that of A
=> Speed of B = 5A km/hr
Time taken by A = 180D/4A = 45D/A
Time taken by B = 180D/5A = 36D/A
Let say they meet after T hrs
=> 4A * T + 5A * T = 180D
=> T = 20D/A hr
20D/A + x = 45D/A => x = 25D/A
20D/A + 8 = 36D/A => D/A = 1/2
x = 25D/A
=> x = 25/2
= 12.5 hrs
Value pf x = 12.5
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Answer:
Step-by-step explanation:
B