Atree casts a shadow 42 feet long. at the same time, a person 5 feet tall casts a shadow 7 feet long. what is the hight of the tree?

height of the tree is 30 feet

Step-by-step explanation:

a tree casts a shadow 42 feet long . at the same time, a person 5 feet tall casts a shadow 7 feet long.

shadow of a 5 feet tall person is 7 feet long

Let x be the height of the tree

shadow of a 42 feet tree is x feet long

Make a proportion

cross multiply

divide by 7 on both sides

x=30

So height of the tree is 30 feet

answer: bearing in mind that a rectangle has a perimeter of length + length + width + width.

step-by-step explanation:

p = perimeter

l = length

x=width

p = 2l + 2x

p = 2(l+x)     < ==== perimeter of the base of the box.

you can not solvr this without numbers