Two trains 350 m and 250 m long are going at 42 km/hr and 30 km per hour respectively in opposite
direction. How long would it take them to pass each other?
Answers
Answered by
6
Answer:
30 seconds
Step-by-step explanation:
42t+30t = 72 t
72t = (350+250)/1000m
t=6/720
t =1/120hr
t=60/120min
t=1/2min
means half a minute which is 30 seconds
Answered by
7
Step-by-step explanation:
Distance = (350+250)m = 600 m
Relative speed
=
(
42
+
30
)
km/hr
=
72
km/hr
=
(
72
×
1000
)
60
×
60
m
/
s
=
20
m/s
Time = distance/speed
=
600
20
s
=
30
s
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