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?
3.6
7.2
8.4
10
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:
188 comments Page 2 of 19.

Mayank Garg said:   8 months ago
Time = 5 min.
Distance = 600 meter.

Distance = 600/5 = 120m in one minute.
In hour = 120x60 = 7200m in one hour.
1km = 1000m.
(112)

Nisha said:   9 months ago
600m = 5 minutes, 120m = 1 minutes (600/5),
1 hour = 60 minutes,
7200m = 60 minutes (120*60),
1000m = 1 km.
7200m = 7.2 km.
(31)

P Lakshmi said:   9 months ago
Changing kmph to mps.
1km = 1000m.
Minute = 60sec.
1000/60×60 = 5/18.

Changing opposite mps to kmph is 18/5.
(13)

Logeshwari said:   9 months ago
1000 meter = 1 kilometer.
3600 seconds = 1 hour.
1000 meter/3600second=1 kilometer/1 hour.
5 meter/18 second = 1 kilometer/1 hour.
(8)

Deepanshu said:   9 months ago
How did we get 18/5?
(14)

Arun kumar said:   12 months ago
How did we get 18/5? Please explain.
(38)

Xiyoz said:   1 year ago
Speed = Distance/Time.
600m Distance.

Time 5 Minute = 300 Seconds.
We need speed km/hr, it means 18/5.
600/300*18/5 = 36/5.
Ans = 7.2.
(52)

Abhigyan Mund said:   1 year ago
We know,

1 min = 60 sec.
5 min = 60 * 5 = 300 sec.
A/c to question;

Distance = 600 m.
Time = 300 Sec.
Now speed = Distance/ Time = 600/ 300 = 2 m/s.
Converting km to meter, multiply with 18/5.
Now, 2*18/5 = 36/5 = 7.2 km/hr.
(49)

Browin said:   1 year ago
S = d/t.
600m = 0.6km.
5minutes = 5/60 = 0.083hr,
S = 0.6/0.083,
= 7.2km/hr.
(43)

Reena roy said:   1 year ago
How did 18 get ( 2*18/5)?
(44)