Where are you from and what you do?

I'm from Duluth, Mn and I play with X-Rays, high 'voltage' and I post on these fora

 

is a seaport city in the U.S. state of Minnesota.
https://www.google.co.in/search?q=D...UICCgB&biw=1024&bih=643#imgrc=OFa5jV_R-x0kFM:

 

What about Wbahn?

 

is a seaport city in the U.S. state of Minnesota

Find Lake Superior on a map of North America (It's a large lake well to the south and west of James Bay) --- The city of Duluth stands at the west-most end of Lake Superior

 

A train 125 m long passes a man, running at 5 km/hr in the same direction in which the train is going, in 10 seconds. The speed of the train is:

 

Hint: The train and the pedestrian are moving in the same direction -- so subtract the pedestrian's speed from that of the train then you may proceed as if the pedestrian is stationary...

 

pedestrian

What is pedestrian?
how are you solving this quickly?

 

Or... To put a 'finer point' on it -- How far will the pedestrian move in 10 seconds?

 

What is pedestrian?

Pedestrian=person traveling on foot...

 

A train 125 m long passes a man, running at 5 km/hr in the same direction in which the train is going, in 10 seconds. The speed of the train is:

converting speed in meter/sec
Speed=5x5/18=1.38metrs per sec
so, in 10 sec d=speedxtime
Distance=1.38x10= 13.8 metrs

 

How to spell this?
Pedestrian
https://translate.google.com/#auto/en/Pedestrian

 

A train 125 m long passes a man, running at 5 km/hr in the same direction in which the train is going, in 10 seconds. The speed of the train is:

converting speed in meter/sec
Speed=5x5/18=1.38metrs per sec
so, in 10 sec d=speedxtime
Distance=1.38x10= 13.8 metrs

Correct! The pedestrian moves 13.88889 meters in the 10 seconds required by the train to pass him...

So... the total length = the ground covered by the pedestrian+the length of the train (i.e. 13.88889m+125m=138,88889)

Can you take it from there?

 

How to spell this?
Pedestrian
https://translate.google.com/#auto/en/Pedestrian

http://dictionary.reference.com/browse/pedestrian

 

then how to find speed?

 

A train 125 m long passes a man, running at 5 km/hr in the same direction in which the train is going, in 10 seconds. The speed of the train is:

I have litle bit problem in english.
what is the use of , comma here

 

then how to find speed?

From above we see that Distance=138.88889 meters and time=10 seconds So....?

 

I have litle bit problem in english.
what is the use of , comma here

I'm not sure the comma should be there --- In any event the meaning of the sentence is that the man is running at a velocity of 5km/hr

 

From above we see that Distance=138.88889 meters and time=10 seconds So....?

D=speed x time.
S=138.88/10
S=49.99 km/hr
ok, that great interesting.

A train 125 m long passes a man, running at 5 km/hr in the same direction in which the train is going, in 10 seconds. The speed of the train is:

A. 45 km/hr B. 50 km/hr
C. 54 km/hr D. 55 km/hr
Answer & Explanation
Answer: Option B

Explanation:
Speed of the train relative to man =

125

m/sec
10
=

25

m/sec.
2
=

25 x 18

km/hr
2 5
= 45 km/hr.

Let the speed of the train be x km/hr. Then, relative speed = (x - 5) km/hr.

x - 5 = 45

x = 50 km/hr.

 

So, what does aptitude mean here after solving this question.

 

D=speed x time.
S=138.88/10
S=49.99 km/hr
ok, that great interesting.

A train 125 m long passes a man, running at 5 km/hr in the same direction in which the train is going, in 10 seconds. The speed of the train is:

A. 45 km/hr B. 50 km/hr
C. 54 km/hr D. 55 km/hr
Answer & Explanation
Answer: Option B

Explanation:



Speed of the train relative to man =

125

m/sec
10
=

25

m/sec.
2
=

25 x 18

km/hr
2 5
= 45 km/hr.

Let the speed of the train be x km/hr. Then, relative speed = (x - 5) km/hr.

x - 5 = 45

x = 50 km/hr.

You're supposed to solve the problem not look up the answer!