3i-Infotech Company Numerical Ability Time Distance and Speed

Q. A train 800 metres long is running at a speed of 78 km/hr. If it crosses a tunnel in 1 minute, then the length of the tunnel (in meters) is:

Option
A. 130
B. 360
C. 500
D. 540

Read Solution (Total 3)

Ans) C (500)
L = 800 m
S = 78kmph = 65/3 mps
Time to pass tunnel = 1min = 60 sec
t.f (800+X)/(60) = (65/3)
=500
12 years agoHelpfull: Yes(5) No(3)

Length=speed*time
length=78*5/18*60seconds
length=1300-800=500
11 years agoHelpfull: Yes(4) No(1)
time=distance/speed
1min=(800+x)*60/7800
9 years agoHelpfull: Yes(0) No(0)

3i-Infotech Other Question

Q. A train travelling at a speed of 75 mph enters a tunnel 3 miles long. The train is mile long. How long does it take for the train to pass through the tunnel from the moment the front enters to the moment the rear emerges?

Option
A. 2.5 min
B. 3 min
C. 3.2 min
D. 3.5 min Q. A 300 metre long train crosses a platform in 39 seconds while it crosses a signal pole in 18 seconds. What is the length of the platform?

Option
A. 320 m
B. 350 m
C. 650 m
D. Data inadequate