Two trains along the same straight rails moving with constant speed 60km/hr and 30km/hr respectively towards each other. If at time t=0, the distance between them is 90km/hr, the time when they collide is
Answers
Answer:
Time the trains will collide is 1 hour
Explanation:
Lets assume the train are Train A and Train B
Speed of train A = 30 km/hr
Speed of train B = 60 km/hr
Assuming train A to be in rest
Since the trains are moving in opposite direction
Therefore, Speed of train B with respect to train A = 60 + 30 = 90 km/hr
At time t=0 , the distance between the trains = 90 km
If we assume train A to be in rest then the speed of train B with respect to train A is 90 km/hr and train B has to cover the distance of 90 km with this speed
Thus the time taken in collission = Distance/Speed
= 90/90
= 1 h
Therefore, the time they collide is 1 hour
Answer:
1 hour
Explanation:
speed = distance/ time
thus, time = distance / speed
= 60 - (-30)/90
= 90/90
= 1 hr