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:
220 comments Page 19 of 22.
Rika Raj said:
9 years ago
T=5/60hour,
D=600/1000Km=3/5Km,
Speed=Distance /Time=3/5*60/5=7.2Km/hr.
D=600/1000Km=3/5Km,
Speed=Distance /Time=3/5*60/5=7.2Km/hr.
Janne said:
9 years ago
Hi guys. I'm still confused. How did you compute 60x5/18 manually? How did you get the answer 50/8? Explain in detail.
Priya said:
9 years ago
How it is coming 18÷5? Please explain it.
Md. jahir uddin said:
9 years ago
Very nice solution. Thanks.
Mr.Nithin said:
9 years ago
Thank you guys for the explanation.
Awanish mishra said:
9 years ago
We know that s=d/t,
d=600m and t=5m,
we know that,
1min.=60sec,
therefore, 5min=5*60=300sec,
600/300,
= 2.
2 * 18/5 = 7.2m/m.
d=600m and t=5m,
we know that,
1min.=60sec,
therefore, 5min=5*60=300sec,
600/300,
= 2.
2 * 18/5 = 7.2m/m.
A.S.Raja said:
8 years ago
Thanks for the explanation friends.
Shanmuga Raja said:
8 years ago
We know that speed=(distance / time).
so speed=(600/300)=2m/s.
2m/s= 2(18/5)=7.2km/hr.
so speed=(600/300)=2m/s.
2m/s= 2(18/5)=7.2km/hr.
Anmol said:
8 years ago
Hi everyone,
Speed = Distance/Speed
Time= Distance/Speed
Distance=Speed x Time
1km=1000m,and 1hr=3600seconds
Therefore, 1km/hr=1000m/3600sec =5m/18sec=5/18m/s.
Therefore,
to change a speed in km/hr to a speed in m/sec, multiply by5/18.
Conversely, to change a speed in m/sec to a speed in km/hr, multiply by 18/5.
Speed = Distance/Speed
Time= Distance/Speed
Distance=Speed x Time
1km=1000m,and 1hr=3600seconds
Therefore, 1km/hr=1000m/3600sec =5m/18sec=5/18m/s.
Therefore,
to change a speed in km/hr to a speed in m/sec, multiply by5/18.
Conversely, to change a speed in m/sec to a speed in km/hr, multiply by 18/5.
Aadarsh kumar said:
8 years ago
Distance= 600 metres.
Time= 5min
Speed =?
Speed = distance/time.
Speed = 600/5=120 m/sec.
Because,
1min=60min
120 min= 120*60 min= 7200 min.
Because,
1 km = 1000 metre.
7200 metre / 1000 metre =7.2 km/hr prove that.
Time= 5min
Speed =?
Speed = distance/time.
Speed = 600/5=120 m/sec.
Because,
1min=60min
120 min= 120*60 min= 7200 min.
Because,
1 km = 1000 metre.
7200 metre / 1000 metre =7.2 km/hr prove that.
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