SOLUTION: A rectangle is 6 cm long and 5 cm wide. When each dimension is increased by x cm, the total area is tripled. Find the value of x using algebra.
Thank you for your help.
Algebra ->
Customizable Word Problem Solvers
-> Misc
-> SOLUTION: A rectangle is 6 cm long and 5 cm wide. When each dimension is increased by x cm, the total area is tripled. Find the value of x using algebra.
Thank you for your help.
Log On
Question 133125: A rectangle is 6 cm long and 5 cm wide. When each dimension is increased by x cm, the total area is tripled. Find the value of x using algebra.
Thank you for your help. Answer by oscargut(2103) (Show Source):
You can put this solution on YOUR website! A rectangle is 6 cm long and 5 cm wide. When each dimension is increased by x cm, the total area is tripled. Find the value of x using algebra.
total area =6*5=30 then
(6+x)(5+x)=3(30)
then x^2+11x+30=90
then x^2+11x+-60=0
then x=(-11+sqrt(361))/2 = 4
or x=(-11-sqrt(361))/2 =-15
x is >0
then x= 4
