The length of a room is 3 feet more than the width. The room has a floor area of 378 square feet. Find the dimensions of the room.
A) Length: 18 feet; Width: 15 feet
B) Length: 21 feet; Width: 18 feet
C) Length: 24 feet; Width: 21 feet
D) Length: 22 feet; Width: 19 feet

Question

Quizplus · Accepted Answer

Let the width be x feet. Then the length is x + 3 feet. The area is given by width * length = 378. So, x(x + 3) = 378. Solving the quadratic equation x^2 + 3x - 378 = 0 gives x = 18. Therefore, the width is 18 feet and the length is 21 feet.

The Length of a Room Is 3 Feet More Than