X and Y are two stations which are 320 km apart. A train starts at a certain time from X and travels towards Y at 70 km/hr. After 2 hours, another train starts from Y and travels towards X at 20 km/hr.
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Answer:
X and Y are two stations which are 320 miles apart. A train starts at a certain time from X and travels towards Y at 70 mph. After 2 hours, another train starts from Y and travels towards X at 20 mph. At what time do they meet?
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11 Answers
Sunil Jain, former Self employed
Answered May 7, 2019 · Author has 264 answers and 69.1K answer views
Ans After 2 hrs. train A (say) would have covered distance of = 70×2 =140miles.
Now remaining distance between trains
320 - 140 = 180miles
Let the two trains meet after t hrs.
Distance (D1 )covered by first train (A) = 70t miles
Distance (D2 )covered by second train (B) = 20t miles
Clearly D1 + D2 = 180
i.e 70t + 20t = 180
90t = 180
t = 2 hrs.
The two trains will meet after 2 hrs.
PLZ MARK AS BRAINLIEST
Answer:
4 hours
Step-by-step explanation:
Distance traveled by train coming from Y in 2 hours=20×2=40 miles
They will meet at a distance of 320−40=280 miles from X
Time required to cover 280 miles by train coming from X
=
70
280
=4 h
Hence they meet after 4 hours.
please please mark as brainlest