rectangle problem 5:
problem
The perimeter of a rectangle is 67.2 metres and the length is 18.3 meters.
calculate a) width? b) area?
answer width:
P = (l + w) * 2
67.2 = (18.3 + w) * 2 / : 2
33.6 = 18.3 + w / – 18.3
width = 15.3 m
A: The width of the rectangle is 15.3 m.
answer area
A = l * w
A = 18.3 * 15.3
A = 279.99 m²
A: The area of the retangle is 279.99 m².