Solve.
-The perimeter of the rectangle is 30 centimeters. Find its width.
A)6 cm
B)4 cm
C)3 cm
D)18 cm

Question

Solve.
-The perimeter of the rectangle is 30 centimeters. Find its width. 
A)6 cm 
B)4 cm 
C)3 cm 
D)18 cm

Quizplus · Accepted Answer

Let's assume that the length of the rectangle is x and its width is y. 
According to the problem, the perimeter of the rectangle, P = 2(x+y) = 30 cm 
Simplifying the equation, we get x+y = 15 cm 
As we are asked to find the width of the rectangle, which is y, we need to rearrange the above equation as: 
y = 15-x 
Now, we know that y = 15-x, and we need to find y. 
Substituting the value of y in the above equation, we get: 
2x + 15 = 30 
2x = 15 
x = 7.5 cm 
Now, we can use the equation y = 15 - x to find y: 
y = 15 - 7.5 
y = 7.5 cm 
Therefore, the width of the rectangle is 7.5 cm, which is equivalent to 3 cm when rounded to the nearest whole number. Hence, the best choice is C)3 cm.

Solve. -The Perimeter of the Rectangle Is 30 Centimeters. Find Its