You can put this solution on YOUR website! It is a proportion
12 is to 5 as 8 is to x.
Cross-multiply and 12x=40 and x=10/3 or 3 1/3 feet is the shadow.
You can put this solution on YOUR website! 12:5 and 8:x
multiply 12:5 times 2
24:10
8:x multiply times 3
24:x and x=10 just like above Now divide both sides by 3:
24/3:10/3
= 8:3.33
The 8 ft cardboard box casts a shadow 3.33 ft long