Two train 100 etres and 95 m metres long respectively passes each other in 27 seconds when they tum in same direction and in 9 seconds when they tum in opposite direction. Find their speed
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yayaras284
26.06.2020
Math
Secondary School
+5 pts
Answered
Two trains 100 metres and 95 metres long respectively pass each other in 27 seconds when
they run in the same direction and in 9 seconds when they run in opposite directions. Speed the two trains are
2
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Answer:
pls mark me brainliest speed is 95m/s, 100m/s
Correct Answer:
B) 52 km/hr,26 km/hr
Let the speed of first train be S1 km/hr and speed of second train is S2 km/ hr
As we know ,
Time=total distance(relative speed in same /opp. direction)
In the same direction.
27 sec=(100+95)(s1−s2)×518
27 sec=195×18(s1−s2)×5
s1−s2=26..........1
In the opp. direction,
9 =(100+95)(s1+s2)×518
9=195×18(s1+s2)×5
s1+s2=39×2
s1+s2=78................2
From equation (1) and (2)
s1−s2=26
s1+s2=78
s1=26+782
s1=1042
s1=52 km/hr and s2=26 km/hr
Hope you understand