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Q. A train of 19 carriages, each of 60 meters length along with an engine of 60 meters length is running at a speed of 90 km/h. In what time will the train cross a 2 km long bridge?

Q. 60 मीटर लंबाई वाली 19 बोगियों की एक ट्रेन 60 मीटर लंबाई के इंजन के साथ 90 किमी/घंटा की गति से चल रही है। ट्रेन 2 किमी लंबे पुल को कितने समय में पार करेगी?

A

2 minutes 8 seconds
2 मिनट 8 सेकेंड
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B

3 minutes 12 seconds
3 मिनट 12 सेकंड
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C

3 minutes 5 seconds
3 मिनट 5 सेकंड
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D

4 minutes 5 seconds
4 मिनट 5 सेकंड
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Solution

The correct option is A
2 minutes 8 seconds
2 मिनट 8 सेकेंड
Option (a)

Total distance =(19×60)+60+(2×1000)=3200 m
Speed of the train =90 km/hr=90×(518)=25 m/s
Thus, the time taken =320025=128 seconds =2 minute 8 seconds

विकल्प (a)

कुल दूरी =(19×60)+60+(2×1000)=3200मीटर
ट्रेन की गति =90 किमी/घंटा =90×(518)=25 मीटर/सेकंड
अत: लिया गया समय =320025=128 सेकंड =2 मिनट 8 सेकंड

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