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:
195 comments Page 3 of 20.
Khushboo Rahman said:
7 years ago
Easy way to solve this problem.
Speed=Distance/Time.
Now,
1km=1000m,
1/1000km=1m,
600/1000km=600m,
i.e. 0.6km=600m,
1hr=60min,
1/60hr=1min,
5/60hr=5min, i.e. 0.083hr=5min.
speed=distance/time.
=(600/5)m/sec.
=(0.6/0.083)km/hr.
speed=7.22km/hr.
Speed=Distance/Time.
Now,
1km=1000m,
1/1000km=1m,
600/1000km=600m,
i.e. 0.6km=600m,
1hr=60min,
1/60hr=1min,
5/60hr=5min, i.e. 0.083hr=5min.
speed=distance/time.
=(600/5)m/sec.
=(0.6/0.083)km/hr.
speed=7.22km/hr.
Swayam said:
1 decade ago
@Priya.
Our question is why we convert 5 min into seconds. Its because of the formula i.e. if speed of the body is 'a'm/sec then when we convert it into km/sec, it becomes (a*18/5) km/sec. In both cases time is required in sec. So it is necessary to convert 5 min into sec. Ok ?
Our question is why we convert 5 min into seconds. Its because of the formula i.e. if speed of the body is 'a'm/sec then when we convert it into km/sec, it becomes (a*18/5) km/sec. In both cases time is required in sec. So it is necessary to convert 5 min into sec. Ok ?
Raj tiwari said:
7 years ago
Use simple logic.
Just one thing is there, basic.
Speed is distance/time.
Since distance is 600m so its 0.6km.
Time is 5 min, so its 5/60, 1/12.
Now, speed= distance/time
speed = 0.6/1by12
hence speed = 0.6*12
think as 10x6 is 60 plus 2 x 6 12.
so 60+12 72.
7.2 answer.
Just one thing is there, basic.
Speed is distance/time.
Since distance is 600m so its 0.6km.
Time is 5 min, so its 5/60, 1/12.
Now, speed= distance/time
speed = 0.6/1by12
hence speed = 0.6*12
think as 10x6 is 60 plus 2 x 6 12.
so 60+12 72.
7.2 answer.
Abdul Basit said:
8 months ago
600 meters in 5 minutes.
To find 1 min distance;
= 600/5
= 120 meters in 1 min
60 min in 1 hour.
Multiply by 60 min to find the total distance in meters in 1 hour.
= 120 * 60.
= 7200 meter.
Convert into kilometre multiplied by 1000;
7200/1000.
7.2 kilometers in 1 hour.
To find 1 min distance;
= 600/5
= 120 meters in 1 min
60 min in 1 hour.
Multiply by 60 min to find the total distance in meters in 1 hour.
= 120 * 60.
= 7200 meter.
Convert into kilometre multiplied by 1000;
7200/1000.
7.2 kilometers in 1 hour.
(50)
Liyaqat said:
9 years ago
1000m = 1 km.
600m = 600/1000 km = 0.6 km.
Time = 5 min.
5min=60/5 = 12h.
S=0.6 x 12 = 7.2.
Is my pattern is right or wrong. I got the answer. But I'm so confuse, I'm doing in a wrong manner but my answer is right that's strange. Please is there anyone to explain.
600m = 600/1000 km = 0.6 km.
Time = 5 min.
5min=60/5 = 12h.
S=0.6 x 12 = 7.2.
Is my pattern is right or wrong. I got the answer. But I'm so confuse, I'm doing in a wrong manner but my answer is right that's strange. Please is there anyone to explain.
Shima said:
3 years ago
Speed = Distance/Time.
Distance = 600 m = 600 *18/5 = 2160,
(We have to multiply distance * 18/5 to convert m to km)
Time = 5 mins = 5/60hrs,
(We have to divide mins by 60 to convert it to hr).
Now, Speed = 2160/5/60 = 2160/5(1/60) = 7.2,
Hope you understood now.
Distance = 600 m = 600 *18/5 = 2160,
(We have to multiply distance * 18/5 to convert m to km)
Time = 5 mins = 5/60hrs,
(We have to divide mins by 60 to convert it to hr).
Now, Speed = 2160/5/60 = 2160/5(1/60) = 7.2,
Hope you understood now.
(3)
Sowgandhika said:
7 years ago
1km=1000meters.
l hr=3600 sec.
So, the speed =distence/time.
If we simplify
1000/3600=5/18 m/s we get.
converting m/s to km/hr ,
m/s = (1/1000)*3600=18/5 km/hr. We get in the given problem, the speed is converting ms to km is,
2*18/5=7.2 km/hr we get.
l hr=3600 sec.
So, the speed =distence/time.
If we simplify
1000/3600=5/18 m/s we get.
converting m/s to km/hr ,
m/s = (1/1000)*3600=18/5 km/hr. We get in the given problem, the speed is converting ms to km is,
2*18/5=7.2 km/hr we get.
Avinash said:
1 decade ago
speed=distance/time
so the given distance is 600m and time is 5 mins..for this we have to convert minutes into seconds..5*60=300 seconds.
speed=(600*300)m/sec=2m/sec bt in answer they given in km/hr so we have to change m/sec in km/hr
speed=(2*18/5)km/hr=7.2 km
so the given distance is 600m and time is 5 mins..for this we have to convert minutes into seconds..5*60=300 seconds.
speed=(600*300)m/sec=2m/sec bt in answer they given in km/hr so we have to change m/sec in km/hr
speed=(2*18/5)km/hr=7.2 km
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.
Rezuan said:
8 years ago
Distance = 600 m.
Time = 5 min = (5 * 60)s = 300 s.
Speed = ?
Speed = Distance/Time = 600m/300s = 2 m/s.
According to question we need to convert it m/s to km/hr.
m/sec=18/5 km/hr.
So, Speed = (2 * 18/5) km/hr.
Speed = 7.2 km/hr.
Time = 5 min = (5 * 60)s = 300 s.
Speed = ?
Speed = Distance/Time = 600m/300s = 2 m/s.
According to question we need to convert it m/s to km/hr.
m/sec=18/5 km/hr.
So, Speed = (2 * 18/5) km/hr.
Speed = 7.2 km/hr.
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