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:
208 comments Page 15 of 21.
Sanju said:
5 years ago
How it is 7.2 km/her?
Anyone explain that.
Anyone explain that.
Vishwa said:
5 years ago
@Sanju,
They said that 600m covered in 5 mins,
How much will he cover in 1hour? right.
just cal. it as
1hr= 60mins right,
Given in 5mins=600m then,
in 60mins=?
Calculate and find out one min distance that is 600/5=120m per min he travels.
So then for 60mins=60*120=7200m i.e, 7.2km.
They said that 600m covered in 5 mins,
How much will he cover in 1hour? right.
just cal. it as
1hr= 60mins right,
Given in 5mins=600m then,
in 60mins=?
Calculate and find out one min distance that is 600/5=120m per min he travels.
So then for 60mins=60*120=7200m i.e, 7.2km.
Mao said:
5 years ago
The answer is 7.2. Agree with the given answer.
Adrija Das said:
5 years ago
Why divided by 60?
If we want to convert minute to seconds then don't we have to multiply the minute * 60? Please anyone explain.
If we want to convert minute to seconds then don't we have to multiply the minute * 60? Please anyone explain.
Pio Myria said:
5 years ago
Step-1: We that distance =600m,time is 5min.
Step-2: Formula=speed=distance/time,
600m/5* 60 = 2m/s.
Step -3 : convert m/s to km/hr.
2*18/5=7.2km/hr ans.
Step-2: Formula=speed=distance/time,
600m/5* 60 = 2m/s.
Step -3 : convert m/s to km/hr.
2*18/5=7.2km/hr ans.
Yashwanth Reddy Chamala said:
4 years ago
Street lenght= 600m.
Time is taken by the person to Cross the street= 5min,
600m/5min*(3/50)=7.2km/hr,
Speed of the person in km=7.2km/hr.
1m/min=3/50km/hr.
Time is taken by the person to Cross the street= 5min,
600m/5min*(3/50)=7.2km/hr,
Speed of the person in km=7.2km/hr.
1m/min=3/50km/hr.
Minnal said:
4 years ago
Street lenght = 600m.
Time is taken by the person to Cross the street = 5min,
600m/5min *(3/50) = 7.2km/hr,
Speed of the person in km =7.2km/hr.
1m/min = 3/50km/hr.
Time is taken by the person to Cross the street = 5min,
600m/5min *(3/50) = 7.2km/hr,
Speed of the person in km =7.2km/hr.
1m/min = 3/50km/hr.
Priya said:
4 years ago
We know that speed= distance/time.
But we can't find the speed for m/min.
So, we can first convert 5 mins to sec. 5*60 = 300 s.
Now we need to find the speed= distance/time= 600/300= 2 m/s.
But we need km/hour. so for converting m/s to km/hour we need to multiply the speed(in m/s) * 18/5 (5/18 for km/hour into m/s).
So, 2*18/5=36/5= 7.2.
But we can't find the speed for m/min.
So, we can first convert 5 mins to sec. 5*60 = 300 s.
Now we need to find the speed= distance/time= 600/300= 2 m/s.
But we need km/hour. so for converting m/s to km/hour we need to multiply the speed(in m/s) * 18/5 (5/18 for km/hour into m/s).
So, 2*18/5=36/5= 7.2.
Umang Joshi said:
4 years ago
Speed = distance*time guys now,
Speed = 5min OR 5*60= 300 second
Distance = 600m.
By using above formula;
s = D/T.
S = 600/5 * 60.
= 2m/sec.
Converting it into km/h to m/sec we do 5/18 which is 1000/3600,
For converting m/s into km/hour use 18/5 -----> (1)
Now using (1).
18/5*2 = 7.2 km/hour answer which is option (B)
hope you all got it.
Speed = 5min OR 5*60= 300 second
Distance = 600m.
By using above formula;
s = D/T.
S = 600/5 * 60.
= 2m/sec.
Converting it into km/h to m/sec we do 5/18 which is 1000/3600,
For converting m/s into km/hour use 18/5 -----> (1)
Now using (1).
18/5*2 = 7.2 km/hour answer which is option (B)
hope you all got it.
Faria said:
4 years ago
1000m = 1 km.
So, 1 m =( 1/1000) km,
600 m = 600/1000, i.e 0.6 km,
In 5 minutes a person passes 0.6km,
In 1 minute a person passes 0.6/5,
In 60 minutes a person passes (0.6x60)/5, i.e 7.2 km.
Ans : 7.2 km.
So, 1 m =( 1/1000) km,
600 m = 600/1000, i.e 0.6 km,
In 5 minutes a person passes 0.6km,
In 1 minute a person passes 0.6/5,
In 60 minutes a person passes (0.6x60)/5, i.e 7.2 km.
Ans : 7.2 km.
(1)
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