Aptitude - Time and Distance - Discussion
Discussion Forum : Time and Distance - General Questions (Q.No. 1)
1.
A person crosses a 600 m long street in 5 minutes. What is his speed in km per hour?
Answer: Option
Explanation:
| Speed = |  |
600 |  m/sec. |
| 5 x 60 |
= 2 m/sec.
Converting m/sec to km/hr (see important formulas section)
| = | |
2 x | 18 | |
km/hr |
| 5 |
= 7.2 km/hr.
Discussion:
209 comments Page 12 of 21.
Sameer kashmiri said:
1 decade ago
1st step:- change 600m into km.
600/1000 = 0.6.
2nd step:- change time 5 minutes into hrs.
5/60 = 0.0833.
You know,
speed = distance/time.
Now put the values,
Speed = 0.6/0.0833.
= 7.2.
600/1000 = 0.6.
2nd step:- change time 5 minutes into hrs.
5/60 = 0.0833.
You know,
speed = distance/time.
Now put the values,
Speed = 0.6/0.0833.
= 7.2.
Nimesh kumar said:
1 decade ago
Speed = Distance/Time.
Here Distance = 600 meters and Time = 5 mins.
Therefore, Speed = 600/5 meters/minutes.
We have to write it as in terms of meters/seconds. So we are multiplying it with 60 (1 min = 60 seconds).
So, Speed = 600/(5 x 60 sec) meters/seconds.
Here Distance = 600 meters and Time = 5 mins.
Therefore, Speed = 600/5 meters/minutes.
We have to write it as in terms of meters/seconds. So we are multiplying it with 60 (1 min = 60 seconds).
So, Speed = 600/(5 x 60 sec) meters/seconds.
Sourav said:
1 decade ago
Its just a one step answer. Just calculate how much he can travel in 60 minutes.
Arpita said:
1 decade ago
How 18/5 come?
Help said:
1 decade ago
I can understand how it came 5/18m/sec but can not understand 18/5 km/hr?
Sasi said:
1 decade ago
We know that, 1 km = 1000 m and 1 hr = 3600 min i.e., 60 min*60 sec.
Like wise, 1 m = 0.001 km and 1 min = 0.00027777777 hr.
Which means, 1 m = 1/1000 = 0.001 km.
1 min = 1/3600=0.00027777777 hr.
So, km/hr = 0.001/0.00027777777 = 3.
6 which means 18/5.
That's why, for km/hr conversion we use 18/5.
Like wise, 1 m = 0.001 km and 1 min = 0.00027777777 hr.
Which means, 1 m = 1/1000 = 0.001 km.
1 min = 1/3600=0.00027777777 hr.
So, km/hr = 0.001/0.00027777777 = 3.
6 which means 18/5.
That's why, for km/hr conversion we use 18/5.
Nvll said:
1 decade ago
@Vinoth.
It doesn't actually matter he will be vaporized in a few ms so will never hear it.
I don't no one person who talks about m/second so why the need to convert to m/s anyway.
I came on to this site to find out what a wind speed of 2 m/s is, who talks about a wind speed of 2 m/s? 7.2 km/hr or 4 m/h or 3.8 knots I can work out, but 2m/s? Very geeky.
It doesn't actually matter he will be vaporized in a few ms so will never hear it.
I don't no one person who talks about m/second so why the need to convert to m/s anyway.
I came on to this site to find out what a wind speed of 2 m/s is, who talks about a wind speed of 2 m/s? 7.2 km/hr or 4 m/h or 3.8 knots I can work out, but 2m/s? Very geeky.
Siva said:
1 decade ago
Where does 18 comes from?
Deba said:
1 decade ago
= (1000/3600) = 5/18 m/sec.
1 km = 1000 m.
1 hr = 3600 sec.
1 km = 1000 m.
1 hr = 3600 sec.
Nik Edrus said:
1 decade ago
How do you get 18/5?
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