16.  A train 360 m long is running at a speed of 45 km/hr. What time will it pass a bridge 140 m long?


40 sec
42 sec
45 sec
48 sec


Answer

 Option

Speed = (45*5/18) m/sec =25/2 m/sec. Total distance covered = (360+140) m = 500 m. Therefore required time = (500*2/25) sec =40 sec.

Workspace

Report
Mail id: Report Error:

Answer Workspace Report

17.  A train traveling at a speed of 75 km/hr enters a tunnel 3 1/2 miles long. the train is 1/4 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?


2.5 min
3 min
3.2 min
3.5 min


Answer

 Option

Total distance covered = (7/2 +1/4) miles = 15/4 miles. Therefore time taken = ( 15/4*75) hrs = 1/20 hrs = (1/20*60) min. = 3 min.

Workspace

Report
Mail id: Report Error:

Answer Workspace Report

18.  A train running at the speed of 60 km/hr crosses a pole in 9 seconds. What is the length of the train?


120 meters
180 meters
150 meters
None of these


Answer

 Option

Speed = (60*5/18) m/sec = (50/3) m/sec. Length of the train = (speed * time) = (50/3*9) m = 150 m.

Workspace

Report
Mail id: Report Error:

Answer Workspace Report

19.  A train 132 m long passes a telegraph pole in 6 seconds. Find the speed of the train?


70 km/hr
72 km/hr
79.2 km/hr
80 km/hr


Answer

 Option

Speed =(132/6) m/sec = (22*18/5) km/hr = 79.2 km/hr.

Workspace

Report
Mail id: Report Error:

Answer Workspace Report

20.  A train covers a distance of 12 km in 10 minutes. If it takes 6 seconds to pass a telegraph post, then the length of the train is?


90 m
100 m
140 m
120 m


Answer

 Option

Speed = (12/10*60) km/hr = (72*5/18) m/sec. Length of the train = (speed*time) = (20*6) m = 120 m.

Workspace

Report
Mail id: Report Error:

Answer Workspace Report