20 = .2r (Divide both sides by .2)

100 ft/s = r.

For the second part r is still 100 ft/s, and time is 3 seconds.

D=RT = 100*3 = 300 feet.

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Answer by josmiceli(19441)   (Show Source): You can put this solution on YOUR website!
( ft/sec ) x ( sec ) = ft
or



I t will travel 300 ft
Answer by beatthewonderlic(5)   (Show Source): You can put this solution on YOUR website!
This is a popular question on the Wonderlic. We have a comprehensive blog post on solving this problem here: http://www.beatthewonderlic.com/blog/2015/1/10/a-train-travels-20-feet-in-15-second-at-this-same-speed-how-many-feet-will-it-travel-in-three-seconds
SOLUTION:
Step 1: Get to 1.
If a train travels 20 feet in 1/5 second, then how far will it travel in 1 whole second? We mus multiply 20 by 5 to find out:
20 * 5 = 100
Step 2: Extrapolate.
If a train travels 20 feet in 1 second, then it must travel 3 times as far in 3 seconds:
100 * 3 = 300
Answer: 300 feet
See here for more Wonderlic help: http://www.beatthewonderlic.com/