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:
220 comments Page 4 of 22.
Dewesh Mishra said:
3 years ago
Distance = 600 m = 0.6 km (since 1 km = 1000 m).
Time = 5 minutes = 5/60 hours (since 1 hour = 60 minutes).
Now we can use the formula:
Speed = Distance/Time.
Speed = 0.6 km / (5/60) hours
Speed = 0.6 km / 0.08333 hours.
Speed = 7.2 km/h
Therefore, the person's speed is 7.2 km/h (kilometres per hour).
Time = 5 minutes = 5/60 hours (since 1 hour = 60 minutes).
Now we can use the formula:
Speed = Distance/Time.
Speed = 0.6 km / (5/60) hours
Speed = 0.6 km / 0.08333 hours.
Speed = 7.2 km/h
Therefore, the person's speed is 7.2 km/h (kilometres per hour).
(18)
MERCY said:
10 months ago
How do we get 18/5? Please explain to me.
(18)
Manya said:
6 months ago
Very helpful. Thanks all for explaining.
(17)
DRIBAREO DOREEN said:
5 months ago
How does the 18 come about? Please explain.
(17)
Priyanka said:
2 years ago
18/5 is a formula that's used to convert m\s to k/hour.
(15)
Raj said:
11 months ago
How 5/18 becomes 18/5? Anyone, please explain.
(15)
Shashi Kumar said:
4 years ago
Convert distance to kilo meters.
So, 600/1000 = 6/10.
And, convert minutes to hours.
So, 5/60.
6/10/5/60 = 36/5 answer is 7.2
So, 600/1000 = 6/10.
And, convert minutes to hours.
So, 5/60.
6/10/5/60 = 36/5 answer is 7.2
(14)
Nikita Pramanik said:
3 years 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.
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)
Deepanshu said:
2 years ago
How did we get 18/5?
(14)
P Lakshmi said:
2 years ago
Changing kmph to mps.
1km = 1000m.
Minute = 60sec.
1000/60×60 = 5/18.
Changing opposite mps to kmph is 18/5.
1km = 1000m.
Minute = 60sec.
1000/60×60 = 5/18.
Changing opposite mps to kmph is 18/5.
(14)
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