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
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:
180 comments Page 1 of 18.

Vijaya lakshmi said:   5 days ago
How did we get 18/5? Please explain to me.
(1)

Aatir said:   2 weeks ago
Distance = 600m = 600/1000 km
= 0.6 km.

Time = 5mint = 5/60 hr = 1/12 hr.
Speed = Distance/time.
= (0.6)/1/12.
= 0.6×12.
=7.2
(14)

Mayank Garg said:   2 months ago
Time = 5 min.
Distance = 600 meter.

Distance = 600/5 = 120m in one minute.
In hour = 120x60 = 7200m in one hour.
1km = 1000m.
7200m = 7.2m=>answer.
(49)

Nisha said:   2 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.
(17)

P Lakshmi said:   2 months ago
Changing kmph to mps.
1km = 1000m.
Minute = 60sec.
1000/60×60 = 5/18.

Changing opposite mps to kmph is 18/5.
(2)

Logeshwari said:   2 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.
(5)

Deepanshu said:   3 months ago
How did we get 18/5?
(11)

Arun kumar said:   5 months ago
How did we get 18/5? Please explain.
(33)

Xiyoz said:   6 months 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.
(48)

Abhigyan Mund said:   6 months 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.
(46)


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