Answer:
perimeter of a rectangle = 100cm
Step-by-step explanation:
in order to find the perimeter of a rectangle we need the length and the width of the rectangle. note that we already know the width which is 10cm but we do not know the value of the length yet . so let us find the width first.
Remember from the question , length is 4 times the width
mathematically,
length = 4 x width
length = 4 x 10
length = 40cm.
now to find the perimeter of the rectangle
the formula for perimeter of a rectangle = 2L + 2W
perimeter of a rectangle= 2 x 40 + 2 x 10
perimeter of a rectangle = 80 + 20
perimeter of a rectangle = 100cm
therefore the perimeter of a rectangle is equal to 100cm
