SOLUTION: a football field is about 50 yards wide by 120 yards long. the border of uniform width around the entire field has an area of about 1800 square yards. how wide is the
border arou
Algebra.Com
Question 302543: a football field is about 50 yards wide by 120 yards long. the border of uniform width around the entire field has an area of about 1800 square yards. how wide is the
border around the field?
do yu think yu can help me
Answer by scott8148(6628) (Show Source): You can put this solution on YOUR website!
area of field ___ 50 * 120 = 6000
area of field and border ___ 6000 + 1800 = 7800
width of field and border ___ 50 + 2b (border on BOTH sides)
length of field and border ___ 120 + 2b (border on BOTH ends)
(50 + 2b)(120 + 2b) = 7800 ___ 6000 + 340b + 4b^2 = 7800
4b^2 + 340b - 1800 = 0 ___ b^2 + 85b - 450 = 0
factoring ___ (b + 90) (b - 5) = 0
b = 5
b = 90 not realistic
RELATED QUESTIONS
Show all steps necessary to arrive at your solution.
A football field is about 50... (answered by oberobic)
can you help me with this last problem; solve using the 5 step problem process
a... (answered by richwmiller,Nate)
Would someone be so kind as to assist me with this problem? A football field is about 50... (answered by jim_thompson5910)
The school's custodian is mowing the grass on the football field by cutting a border... (answered by ankor@dixie-net.com)
A football field is 40 yards wide and 120 yards long. Find the distance between opposite... (answered by richwmiller)
A football field is 100 yards long and has a distance around of 308 yards. How wide is... (answered by Fombitz)
A concrete sidewalk that goes around a football field is 4 yards wide. The length of the (answered by josgarithmetic)
A football field is 120 yards long and 53 yards wide. How much fencing is needed to... (answered by checkley79)
A football coach has his team run sprints diagonally across a football field. If the... (answered by nerdybill)