Ques:- The time taken by a train 180 m long, travelling at 42 kmph, in pasing a person walking in the same direction at 6 kmph, will be
A. 16 sec
B. 18 sec
C. 21 sec
D. 24 sec
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18 s
18sec
The time taken by a train =180 m
train travelling speed s1 = 42km/ hr
a person walking in the same direction s2 = 6 km/ hr
s=s1-s2
speed= distance/ time
time= distance/speed
speed 36 km/hr into m/s
36*0.277=10
t=180/10
t= 18sec
B
D = 180m
S = 42 – 6 = 36 * 5/18 = 10
T = D/S = 180/10
T = 18s