Exactly as in the question.
21
2(21+12) = 66 feet
21 x 2 has greatest perimeter
Make it 2 wide and 21 long and you've got it.
the formula for the perimeter of a rectangle is p = 2W + 2L, where L is the length and W is the width, so your first equation is 126 = 2W + 2L"twice as long as it is wide" means that the length L is 2 times the width W, so your second equation is L = 2WIn order to solve for the dimensions, you can substitute L for 2W in the first equation to get:126 = L + 2L126 = 3LL = 126/3L = 42and because L = 2W:42 = 2WW = 42/2W = 21
26.4 inches for the diagonal.
add 21 and 13 and double the answer!
21
2(21+12) = 66 feet
Make it 2 wide and 21 long and you've got it.
21 x 2 has greatest perimeter
The area of rectangle is : 21.0
21 foot long by 13.5 foot wide for one service box, 21 ft by 27 ft for two.
the formula for the perimeter of a rectangle is p = 2W + 2L, where L is the length and W is the width, so your first equation is 126 = 2W + 2L"twice as long as it is wide" means that the length L is 2 times the width W, so your second equation is L = 2WIn order to solve for the dimensions, you can substitute L for 2W in the first equation to get:126 = L + 2L126 = 3LL = 126/3L = 42and because L = 2W:42 = 2WW = 42/2W = 21
The dimensions of the rectangle are 21 units by 9 units
21 square feet EZ
Multiply the two dimensions to get the area. The calculation will give you 189 square feet, which converts to 21 square yards.