# 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:

182 comments Page 2 of 19.
Dewesh Mishra said:
1 year 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)

Sasi said:
9 years ago

We know that, 1 km = 1000 m and 1 hr = 3600 min i.e., 60 min*60 sec.

Like wise, 1 m = 0.001 km and 1 min = 0.00027777777 hr.

Which means, 1 m = 1/1000 = 0.001 km.

1 min = 1/3600=0.00027777777 hr.

So, km/hr = 0.001/0.00027777777 = 3.

6 which means 18/5.

That's why, for km/hr conversion we use 18/5.

Like wise, 1 m = 0.001 km and 1 min = 0.00027777777 hr.

Which means, 1 m = 1/1000 = 0.001 km.

1 min = 1/3600=0.00027777777 hr.

So, km/hr = 0.001/0.00027777777 = 3.

6 which means 18/5.

That's why, for km/hr conversion we use 18/5.

Shivani said:
6 years ago

@Dorothyeva.

Speed = distance /time.

D=600 m,

T=5 minutes,

T=5*60 sec,

Now put into formula.

Speed= 600/300 (m/s).

But we are required to find it in km/hr.

Km/hr......> m/s. (Multiply it by 5/18).

m/s..........> km/hr. (Multiply it by 18/5).

S =(600/300) * 18/5.

S=36/5.

Speed = 7.2 km/hr.

Speed = distance /time.

D=600 m,

T=5 minutes,

T=5*60 sec,

Now put into formula.

Speed= 600/300 (m/s).

But we are required to find it in km/hr.

Km/hr......> m/s. (Multiply it by 5/18).

m/s..........> km/hr. (Multiply it by 18/5).

S =(600/300) * 18/5.

S=36/5.

Speed = 7.2 km/hr.

Bukhari said:
8 years ago

It is very simple. If someone covers a distance of 600 meters in 5 minutes then in 1hour (60 minutes) he will cover a distance is,

600 metre = 5 minutes.

Multiplying with 12 both sides.

600 x 12 = 5 x 12,

7200 m = 60 minutes (1 hour),

7200/1000 m = 1 hour,

7.2 km in one hour.

So, speed is 7.2 km/hour.

600 metre = 5 minutes.

Multiplying with 12 both sides.

600 x 12 = 5 x 12,

7200 m = 60 minutes (1 hour),

7200/1000 m = 1 hour,

7.2 km in one hour.

So, speed is 7.2 km/hour.

Sheela M B said:
1 decade ago

To: Digant, Deepak. Pk, Sundar and Ravi S

Great guys. All of you have helped freshers in every best possible way to learn through... And freshers need not panic, go through all suggestions and sure you shall end up with happy results. & its an enlightning that you never forget your basics.

Great guys. All of you have helped freshers in every best possible way to learn through... And freshers need not panic, go through all suggestions and sure you shall end up with happy results. & its an enlightning that you never forget your basics.

Liyaqat said:
8 years ago

@Suriya.

As we know 1km/hour=1000m / 60min x 60sec [bcoz 1km=1000m n 1h=60sec x 60min].

So 1 km/hour = 5/18 m/s.

Now listen if we convert km/h into m/s then we x 5/18.

If we convert m/s into km/h then we x 18/5. So 18 is there. Because we take a reciprocal during conversion of m to km.

As we know 1km/hour=1000m / 60min x 60sec [bcoz 1km=1000m n 1h=60sec x 60min].

So 1 km/hour = 5/18 m/s.

Now listen if we convert km/h into m/s then we x 5/18.

If we convert m/s into km/h then we x 18/5. So 18 is there. Because we take a reciprocal during conversion of m to km.

Vishwa said:
4 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.

Sandip said:
1 decade ago

Simply,

One man cover 600 m in 5 minute

first calculation wht is dist cover for 1 minute

600mtr/5min = 120meter is cover per(1) minute

qus is find the km/perhour

1hour=60minute

120mtr*60minute = 7200meter is cover in 1hour(60minute)

find km

1000meter=1km

=7200/1000=7.2 km/perhour

One man cover 600 m in 5 minute

first calculation wht is dist cover for 1 minute

600mtr/5min = 120meter is cover per(1) minute

qus is find the km/perhour

1hour=60minute

120mtr*60minute = 7200meter is cover in 1hour(60minute)

find km

1000meter=1km

=7200/1000=7.2 km/perhour

Khushboo Rahman said:
6 years ago

Easy way to solve this problem.

Speed=Distance/Time.

Now,

1km=1000m,

1/1000km=1m,

600/1000km=600m,

i.e. 0.6km=600m,

1hr=60min,

1/60hr=1min,

5/60hr=5min, i.e. 0.083hr=5min.

speed=distance/time.

=(600/5)m/sec.

=(0.6/0.083)km/hr.

speed=7.22km/hr.

Speed=Distance/Time.

Now,

1km=1000m,

1/1000km=1m,

600/1000km=600m,

i.e. 0.6km=600m,

1hr=60min,

1/60hr=1min,

5/60hr=5min, i.e. 0.083hr=5min.

speed=distance/time.

=(600/5)m/sec.

=(0.6/0.083)km/hr.

speed=7.22km/hr.

Swayam said:
1 decade ago

@Priya.

Our question is why we convert 5 min into seconds. Its because of the formula i.e. if speed of the body is 'a'm/sec then when we convert it into km/sec, it becomes (a*18/5) km/sec. In both cases time is required in sec. So it is necessary to convert 5 min into sec. Ok ?

Our question is why we convert 5 min into seconds. Its because of the formula i.e. if speed of the body is 'a'm/sec then when we convert it into km/sec, it becomes (a*18/5) km/sec. In both cases time is required in sec. So it is necessary to convert 5 min into sec. Ok ?

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