# 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:
174 comments Page 1 of 18.

Deepanshu said:   1 week ago
How did we get 18/5?
(4)

Arun kumar said:   3 months ago
How did we get 18/5? Please explain.
(29)

Xiyoz said:   4 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.
(38)

Abhigyan Mund said:   4 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.
(38)

Browin said:   5 months ago
S = d/t.
600m = 0.6km.
5minutes = 5/60 = 0.083hr,
S = 0.6/0.083,
= 7.2km/hr.
(40)

Reena roy said:   6 months ago
How did 18 get ( 2*18/5)?
(43)

Prashanth said:   7 months ago
D = S*T.
D = 600m,
T = 5 mints => 5 * 60 = 300 sec.

S = D/T = 600/300 = 2 m/sec.
convert m/sec to km/hr,
2*18/5 = 7.5.
(33)

Nikita Pramanik said:   7 months ago
We have to convert meters per minute to kilometers per hour.
1 km = 1000 m

Therefore,

Speed = Distance/Time.
Speed = (600 m/5 min) * (60 min/1 hr) * (1 km/1000 m),
Speed = 12 km/hr.
Therefore, the person's speed is 12 km/hr.
(14)

R Selva said:   7 months ago
600/5=120m
60*120=7200
7.2km.

Correct me, If I am wrong.
(90)

Bash Richard said:   8 months ago
Distance= 600m
= 0.6km
Time = 5mins.
=5/60hrs.
Speed = D/T.
= 0.6/0.08333.
= 7.2km/hr.
So, Speed = 7.2km/hr.
(39)