How tall is the tree?
2007-08-20 06:14:53 · 8 answers · asked by Boogie 2 in Science & Mathematics ➔ Mathematics
5/x=0.4/1
so 0.4x=5
height of the tree = 5/.4 = 12.5 meters
2007-08-20 06:18:45 · answer #1 · answered by bradlelf 2 · 0⤊ 0⤋
This is a proportion question. The ratio of the height of each item to its shadow length is the same. So 1 meter/0.4 meter = X / 5 meter.
Solve for X.
2007-08-20 06:20:46 · answer #2 · answered by cattbarf 7 · 0⤊ 0⤋
You can find this using ratios: 1 is to .4 as what is to 5?
1 / .4 = x / 5
5(1/.4) = 5x/5
5/.4 = x
12.5 = x
so the tree is 12.5 meters high.
2007-08-20 06:19:42 · answer #3 · answered by soelo 5 · 0⤊ 0⤋
Ratio
1/.4=x/5
cross multiply
5=.4x
x=12.5 meters
2007-08-20 06:21:07 · answer #4 · answered by science teacher 7 · 0⤊ 0⤋
This is a problem of similar triangles. In similar triangles (where the angles are equivalent in both), Height/length is always the same. Try it - 1m/1m = 2m/2m = 3m/3m; likewise, 2m/1m = 4/2m = 6m/3m, and so on. Here's how you solve it buddy:
1 meter-high is to 0.4 meters-long
as
x meters-high is to 5 meters-long
x*0.4 = 1*5 => x = 1*5/0.4 = 12.5 meters
You get the equation above by what I call "the rule of x". Cross both sides so x is multiplied by 0.4, 1m multiplied by 5m, and set them on different sides of the equation.
2007-08-20 06:18:18 · answer #5 · answered by Anonymous · 0⤊ 1⤋
12.5 meters
2007-08-20 06:20:02 · answer #6 · answered by John M 3 · 0⤊ 0⤋
1/h = 0.4/5
h= 5/0.4=12.5m
2007-08-20 06:20:10 · answer #7 · answered by MathStudent 3 · 0⤊ 0⤋
Cross multiply.
This is too simple to answer.
2007-08-20 06:19:43 · answer #8 · answered by muddypuppyuk 5 · 0⤊ 1⤋