Aptitude - Problems on Trains - Discussion
Discussion Forum : Problems on Trains - General Questions (Q.No. 1)
1.
A train running at the speed of 60 km/hr crosses a pole in 9 seconds. What is the length of the train?
Answer: Option
Explanation:
| Speed = |  |
60 x | 5 |  m/sec |
= | |
50 | m/sec. |
| 18 | 3 |
Length of the train = (Speed x Time).
 Length of the train = |
|
50 | x 9 | m = 150 m. |
| 3 |
Discussion:
643 comments Page 9 of 65.
Lokesh said:
10 months ago
Speed = 60 km/hr.
Convert to m/s: 60 × 1000.
3600 = 16.67 m/s
Time to cross the pole = 9 s
Length = Speed × Time
= 16.67 × 9
= 150 m.
Convert to m/s: 60 × 1000.
3600 = 16.67 m/s
Time to cross the pole = 9 s
Length = Speed × Time
= 16.67 × 9
= 150 m.
(23)
Nithish.S said:
4 years ago
Convert km to m - 60000.
Convert hr to sec - 3600.
Sso, 60000/3600 = 16.666(speed) * 9 (time) = 150.
Convert hr to sec - 3600.
Sso, 60000/3600 = 16.666(speed) * 9 (time) = 150.
(22)
Manikandan said:
3 years ago
Data:
T=9,
S=?,
L=?
Time = length/seconds.
S = 60*5/18.
S = 16.6666,
T = L/S.
9 = L/16.6666,
L = 9×16.6666,
L = 149.9,
L = 150.
T=9,
S=?,
L=?
Time = length/seconds.
S = 60*5/18.
S = 16.6666,
T = L/S.
9 = L/16.6666,
L = 9×16.6666,
L = 149.9,
L = 150.
(22)
DHANASURIYA M G said:
4 months ago
Length = Speed × Time.
First, convert the speed from km/hr to m/s:
60 km/hr = 60 × (5/18) m/s = 50/3 m/s.
Then, multiply by the time (9 seconds):
Length = (60 × 5/18) × 9 = 150 meters
First, convert the speed from km/hr to m/s:
60 km/hr = 60 × (5/18) m/s = 50/3 m/s.
Then, multiply by the time (9 seconds):
Length = (60 × 5/18) × 9 = 150 meters
(22)
Pasupuleti Rohith Kumar said:
3 months ago
@All.
Given:
Speed of train = 60 km/hr.
Time taken to cross a pole = 9 sec.
Formula:
=>Length of Train = Speed × Time.
Step 1: Convert speed into m/s.
=>60×(5/18).
=>(300/18).
=>(50/3) m/s.
Step 2: Calculate the length of the train:
Length= (50/3)×9.
=>50×3.
=>150 meters.
Another Shortcut Method:
=>60 ×(5/18) × 9
=>60 × (5/18) × 9
=>60 × (5/2)
=>30 × 5.
=>150 meters.
Given:
Speed of train = 60 km/hr.
Time taken to cross a pole = 9 sec.
Formula:
=>Length of Train = Speed × Time.
Step 1: Convert speed into m/s.
=>60×(5/18).
=>(300/18).
=>(50/3) m/s.
Step 2: Calculate the length of the train:
Length= (50/3)×9.
=>50×3.
=>150 meters.
Another Shortcut Method:
=>60 ×(5/18) × 9
=>60 × (5/18) × 9
=>60 × (5/2)
=>30 × 5.
=>150 meters.
(22)
Anjali Singh said:
2 years ago
Should any one tell me how 5/18 came here?
(21)
Narayan Karki said:
3 years ago
Where,
Speed = Distance(s)/Time(t).
To convert speed into m/s from km/hr.
Then, use the formula = Speed x Time = 100/6 * 9 = 150m.
Speed = Distance(s)/Time(t).
To convert speed into m/s from km/hr.
Then, use the formula = Speed x Time = 100/6 * 9 = 150m.
(20)
Muhammed Jamsheer said:
3 years ago
@Raj
To convert km to metre;
Km - m = × 5/18.
m - km = × 18/5.
To convert km to metre;
Km - m = × 5/18.
m - km = × 18/5.
(20)
Ivan said:
2 years ago
I still don't understand. How 5/18 came? Please explain to me.
(20)
Srivatsan C said:
4 weeks ago
In one our travels 60 km.
In 60 min travels 60km which is in 1 min travels 1 km and in 60 sec it travels 1000 m.
Then, in 1 sec travels 16.666m.
As the train reaches the pole in 9 sec, so 16.66 * 9 = 150.
In 60 min travels 60km which is in 1 min travels 1 km and in 60 sec it travels 1000 m.
Then, in 1 sec travels 16.666m.
As the train reaches the pole in 9 sec, so 16.66 * 9 = 150.
(19)
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