The length of a rectangle is 3 times the width and its area is 108 square units. What is the length of the rectangle?

6 units

12 units

15 units

18 units

Question

The length of a rectangle is 3 times the width and its area is 108 square units. What is the length of the rectangle?

6 units

12 units

15 units

18 units

phi · Answer

do you know the formula for the area of a rectangle ?

anonymous · Answer

@phi No ._.

anonymous · Answer

Isn't it A = W x L ?

jack1 · Answer

yep, Area = Length x Width (for a rectangle)
so A = 108
A = L x W
108 = L x W
also L = 3W
so 108 = L x W
108 = 3W x W

jack1 · Answer

can you solve from here for W and then L...? @nananea1998

anonymous · Answer

Do I divide 108 with 4 ??? Is that going the right direction ?

jack1 · Answer

not yet...
hint:  5a x a = 5a^2... not 6a

anonymous · Answer

@Jack1 So it's 18?? That's the answer I came up with

jack1 · Answer

k... ah for L, yep L = 18

anonymous · Answer

@Jack1  Thank youu!! ^_^

jack1 · Answer

all good, this was all u hey, props!