Two trains, each 100 m long, moving in opposite directions, cross each other in 8 seconds. If one is moving twice as fast the other, then the speed of the faster train is?
Two trains 140 m and 160 m long run at the speed of 60 km/hr and 40 km/hr respectively in opposite directions on parallel tracks. The time (in seconds) which they take to cross each other, is?
A.
9
B.
9.6
C.
10
D.
10.8
Answer: Option D
Explanation:
Relative speed = (60 + 40) km/hr =
100 x
5
m/sec
=
250
m/sec.
18
9
Distance covered in crossing each other = (140 + 160) m = 300 m.
A train 110 metres long is running with a speed of 60 kmph. In what time will it pass a man who is running at 6 kmph in the direction opposite to that in which the train is going?
A.
5 sec
B.
6 sec
C.
7 sec
D.
10 sec
Answer: Option B
Explanation:
Speed of train relative to man = (60 + 6) km/hr = 66 km/hr.
m/sec
x + 250 = 520