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Re: @math people

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Zwuh is not online. Zwuh
Joined: 01 Sep 2010
Total Posts: 10820
03 Mar 2016 08:56 PM
A train 1000 yards long travels through a 3000 yard tunnel. Thirty seconds

pass from the time the last car has just completely entered the tunnel until the

time when the front of the engine emerges from the other end.

Determine the speed of the train, in miles per hour.
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RomanThug is not online. RomanThug
Joined: 17 Jun 2015
Total Posts: 2293
03 Mar 2016 08:59 PM
Um boom boom goes the car
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ash877 is not online. ash877
Joined: 18 Feb 2008
Total Posts: 5142
03 Mar 2016 09:00 PM
so the train was already 1000 yards in the tunnel and after 30s it traveled 2k yards since the front of the engine emerged from the other end? so 2k/30s?


#code alert("I am awesome c:")
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ash877 is not online. ash877
Joined: 18 Feb 2008
Total Posts: 5142
03 Mar 2016 09:02 PM
1.14/0.00833333=answur?


#code alert("I am awesome c:")
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Last_Airbender is not online. Last_Airbender
Joined: 05 Oct 2012
Total Posts: 23586
03 Mar 2016 09:04 PM
visualizing......

visualization complete

1000 yards in is when the train starts
so the front of the train (where the engine is) exits 2000 yards later

2000 / 30 secs = yards / sec

66.67 yards / second is traveled by the train

convert to miles per hour

3600 seconds in 1 hour

66.67 yards * 3600 yards / hour

1760? yards per mile

(66.67 yards * 3600 seconds ) / 1760 yards / mile = miles / hour


Centurians | Rionan | Qiaolian | Pyrante | Send me trades on 8.3M+ in limiteds, am upgrading!
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Roblox_Guest is not online. Roblox_Guest
Joined: 30 Jun 2013
Total Posts: 9921
03 Mar 2016 09:06 PM
the speed of the train was... a number, :O i got it rite
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