4 = 3/4The ferris wheel casts a shadow that is 20 m longX*3/4 = 20x = 20*4/3 {when you divide by a fraction, invert and multiply instead}x = 80/3x = 26.......
This means that if you know the ratio of the giraffe's height to his shadows height (18/12), Corry's shadow will have the *same* ratio (x/4).
18/12 = x/4. Solve for x.
Problem 2 is similar. A ferris wheel of height X has a 20 meter shadow. A man of 1.8 meters has a 2.4 meter shadow.
X/20 = 1.8/2.4
You need to use proportion.
Something 18 feet tall casts a shadow 12 feet tall. So the shadow is 18/12 or 2/3 the height of the original object.
Cory casts a shadow 4 feet tall. So x*2/3 = 4
x = 4*3/2
x = 6
You were correct on Cory's height
Now you need to do the same thing for the second one.
A man 1.8m tall casts a shadow that is 2.4m long
So the ratio here is 1.8/2.4 = 3/4
The ferris wheel casts a shadow that is 20 m long
X*3/4 = 20
x = 20*4/3 {when you divide by a fraction, invert and multiply instead}
x = 80/3
x = 26.6m
