SOLUTION: Tormo bought a perfectly square table but found it wont fit through his door. He reduces its width by 9cm but also extends its length by 9cm- its new area is 309cm^2. what was the

Question 1130642: Tormo bought a perfectly square table but found it wont fit through his door. He reduces its width by 9cm but also extends its length by 9cm- its new area is 309cm^2. what was the area of his original square table.
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
original table has side length x and area x^2 cm^2.
(x-9)(x+9)=309 cm^2
x^2-81=309
x^2=390, and the area of the original table was 390 cm^2. ANSWER
x=19.75 cm and the new table was 10.75 cm x 28.75 cm
RELATED QUESTIONS
I need help with this problem please: I found it on here but it is worded wrong. Hazel (answered by nerdybill)

freds front door is 52in. wide and 94in tall. He puchased a cicular table that 96in in... (answered by Alan3354)

jill's front door is 42" wide and 84" tall. she purchased a circular table that is 96... (answered by ikleyn)

A survey found that women's heights are normally distributed with mean 63.6 in and... (answered by Boreal,amandaro)

Jill's front door is 42" wide and 84" tall. She purchases a circular table that is 96" in (answered by stanbon)

Ana's front door is 42 inches wide and 84 inches tall. She purchased a circular table... (answered by ikleyn)

Rick has 45 cubes each with a side length of 1cm. He wants to use all his cubes to make... (answered by Theo)

Patrick is replacing a door in his house. It has a height of 80 inches and its diagonal... (answered by Boreal)

Jack bought a new digital camera as a birthday present for his wife, but by the time he... (answered by ankor@dixie-net.com)