Amy wants to fence in a yard using 400 feet of fencing. If she wants the yard to be 30-feet wide, how long will it be?

Amy wants to fence in a yard using 400 feet of fencing. If she wants the yard to be 30-feet wide, how long will it be?

Detailed Explanation

The formula used to determine the perimeter of a rectangle is P = 2(L + W). The width is 30, and the perimeter is 400. 400 = 2(L + 30).

400 = 2L + 60

340 = 2L

L = 170

400 = 2L + 60

340 = 2L

L = 170