Questions on Algebra: Systems of Linear Equations answered by real tutors!

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Question 168320: The distance that a free falling body falls varies directly with the square of the time it falls. If a body fall 400 feet in 5 seconds, how far does it fall in 3 seconds?: The distance that a free falling body falls varies directly with the square of the time it falls. If a body fall 400 feet in 5 seconds, how far does it fall in 3 seconds?
Answer by Mathtut(1331) About Me  (Show Source):
You can put this solution on YOUR website!
400/5^2=x/3^2
400/25=x/9 cross multiply
25x=3600
highlight(x=144)feet