361. A train 100m long is running at the speed of 30 km/hr. The time (in second) in which it will pass a man standing near the railway line is :

1. 1. 10

   
   
   

   2. 11

   
   
   

   3. 12

   
   
   

   4. 15

   
   
   

---

1. View Hint View Answer Discuss in Forum

   In this situation, the train covers it length.
   

   Required time =	100	hr.
   	30 × 1000

   
   

   Required time =	100 × 60 × 60	= 12 seconds
   	30 × 1000

   Correct Option: C

   In this situation, the train covers it length.
   

   Required time =	100	hr.
   	30 × 1000

   
   

   Required time =	100 × 60 × 60	= 12 seconds
   	30 × 1000

---

362. How many seconds will a 500 metre long train take to cross a man walking with a speed of 3
     km/hr. in the direction of the moving train if the speed of the train is 63 km/hr ?

1. 1. 25 sec

   
   
   

   2. 30 sec

   
   
   

   3. 40 sec

   
   
   

   4. 45 sec

   
   
   

---

1. View Hint View Answer Discuss in Forum

   Relative speed of train = 63–3 = 60 kmph
   

   = 60 ×	5	m/sec
   	18

   
   

   ∴  Time =	Length of train
   	Relative Speed

   
   

   =	500 × 18	= 30 sec.
   	60 × 5

   Correct Option: B

   Relative speed of train = 63–3 = 60 kmph
   

   = 60 ×	5	m/sec
   	18

   
   

   ∴  Time =	Length of train
   	Relative Speed

   
   

   =	500 × 18	= 30 sec.
   	60 × 5

---

---

363. A train is 125 m long. If the train takes 30 seconds to cross a tree by the railway line, then the speed of the train is :

1. 1. 14 km/hr

   
   
   

   2. 15 km/hr

   
   
   

   3. 16 km/hr

   
   
   

   4. 12 km/hr

   
   
   

---

1. View Hint View Answer Discuss in Forum

   Speed =	Distance
   	Time

   
   

   =	125	= 4.16m/s
   	30

   
   

   4.16 m/s = 4.16 ×	18
   	5

   
   = 15 km/hr

   Correct Option: B

   Speed =	Distance
   	Time

   
   

   =	125	= 4.16m/s
   	30

   
   

   4.16 m/s = 4.16 ×	18
   	5

   
   = 15 km/hr

---

364. A 120 m long train takes 10 seconds to cross a man standing on a platform. What is the speed of the train ?

1. 1. 12 m/sec.

   
   
   

   2. 10 m/sec.

   
   
   

   3. 15 m/sec.

   
   
   

   4. 20 m/sec.

   
   
   

---

1. View Hint View Answer Discuss in Forum

   In crossing a man standing on platform, train crosses its own length.
   

   ∴  Speed of train =	120	= 12 m/s
   	10

   Correct Option: A

   In crossing a man standing on platform, train crosses its own length.
   

   ∴  Speed of train =	120	= 12 m/s
   	10

---

---

365. A 120 metre long train is running at a speed of 90 km per hour. It will cross a railway platform 230 m long in :

1. 1. 4	4	seconds
      	5

   
   
   

   2. 9	1	seconds
      	5

   
   
   

   3. 7 seconds

   
   
   

   4. 14 seconds

   
   
   

---

1. View Hint View Answer Discuss in Forum

   Speed of train = 90 kmph
   

   = 90 ×	5	= 25 m/sec
   	18

   
   Distance covered
   = 230 + 120 = 350 m
   

   ∴  Time taken =	350	= 14 seconds
   	25

   Correct Option: D

   Speed of train = 90 kmph
   

   = 90 ×	5	= 25 m/sec
   	18

   
   Distance covered
   = 230 + 120 = 350 m
   

   ∴  Time taken =	350	= 14 seconds
   	25

---