Train A departed from City A at a speed of 80 kilometers an hour, and at the same time Train B departed from City B.
Train B is 50% faster than Train A. The distance between the cities is 600 kilometeres.
How long after their departure did the two trains meet?
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Answer:
after 3 hours, the trains will meet
Explanation:
distance from city a to city b is 600km.
speed of train a = 80kmph
speed of train b = 120kmph.
after 1 hr, train a = 80km from a station and train b 480km from station a i.e. 120km from station b.
in 2nd hour, train a is 160km away from city a and train b is 360 km away from city a.
in 3rd hr, train a is 240km away from city a and train b is also 240 km away from station a.
or we can say total distance ÷ (velocity of train a + velocity of train b )
=600÷(80+120)
=600÷200
=3 hr
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