A train M leaves Meerut at 5 a.m and reaches Delhi at 9 a.m. Another train leaves Delhi at 7 a.m and reaches Meerut at 10.30 a.m. At what time do the two trains corss each other?
Answers
Answered by
1
Step-by-step explanation:
Let the distance between Meerut and Delhi be x km and let the trains meet y hours after 7 a.m.
Clearly, M covers x km in 4 hrs and N covers x km in (
2
7
) hrs.
Speed of M =
4
x
km\hr Speed of N =
7
2x
km\hr
Distance covered by M in(y+2) hrs + Distance covered in y hrs = x.
∴
4
x
(y+2)+
7
2x
y=x⇒
4
y+2
+
7
2y
=1⇒y=
15
14
hr=
15
14
×60=56min
Hence,the train meet at 7.00+0.56=7.56am
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