SOLUTION: find the area of a rectangle given that its perimeter is 60 millimeters and its width is 12 millimeters

Algebra.Com
Question 686274: find the area of a rectangle given that its perimeter is 60 millimeters and its width is 12 millimeters
Answer by xbscpex(1)   (Show Source): You can put this solution on YOUR website!
Perimeter is 60mm.
W= 12mm
2L + 2W = 60 divide both sides by 2
L + W = 30 ==> Equation 1
substitute W in equation 1
L + 12 = 30
L = 18
Solve area
A = L * W
A = 18 * 12
A = 216 mm^2

RELATED QUESTIONS

A rectangle has sides of length 20 millimeters and 16 millimeters. What is the perimeter? (answered by macston)
A rectangular piece of plastic is 6 millimeters wide and 3 millimeters tall. What is its... (answered by Stitch)
THE LENGTH OF A RECTANGLE IS 12 CM GREATER THAN ITS WIDTH. IF THE PERIMETER OF THE... (answered by josgarithmetic)
An isosceles trapezoid has a perimeter of 108.5 millimeters. Its shorter base measures 1... (answered by josgarithmetic,Amily_2190)
Right triangle ABC with legs AB= 9 millimeters and BC= 12 millimeters is the base of a... (answered by alicealc)
What is the perimeter, in square centimeters, of a rectangle that has a length of 4... (answered by pragya.ban@gmail.com)
The new iPhone 6 Plus has a perimeter of 471.8 millimeters. The height of the new phone... (answered by macston,Timnewman)
The height of a triangle is 2 millimeters less than the base. If the area is 60 square... (answered by Earlsdon)
The length of a rectangle is twice its width. The perimeter is 60 ft. Find its... (answered by rfer)