# 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:
187 comments Page 1 of 19.

Abdul Basit said:   3 days 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.
(1)

Rinose said:   4 weeks ago
It was a format when converted to m/s to km /hr use 18/5 and Km/hr to m/s use 5/18.
(5)

Vinay sharma said:   4 weeks 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.
(11)

Priyanka said:   1 month ago
18/5 is a formula that's used to convert m\s to k/hour.
(9)

Mansi tyagi said:   1 month ago
Speed = 600 m/sec.
=> 600/ 5 x 60,
= 2 m/sec.

Converting m/sec to km/hr (see important formulas section)
2 multiply 3600/1000,
= 18 km/hr.
Then
= 2 x18/5 km/hr
= 7.2 km/hr.
(5)

Raghavendra BS said:   4 months ago
600/5 = 120.
120m per minute.
120 * 60min = 7200m.
1000m = 1 km.
7200/1000 = 7.2km per hour.
(169)

Vignesh said:   5 months ago
Good explanation. Thanks, everyone.
(25)

Vijaya lakshmi said:   6 months ago
How did we get 18/5? Please explain to me.
(37)

Aatir said:   6 months 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
(63)

Mayank Garg said:   7 months ago
Time = 5 min.
Distance = 600 meter.

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