Question

If the perimeter of a rectangle is 20 cm and width is 4 cm what is its length

Answer 1

hi there perimeter of rectangle=2(l+b)
20=2(4+l)
20=8+2L
20-8=2l
12=2L
12/2=l
6=l
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Answer 2

Hi !!!

Here is your answer,

Perimeter of rectangle = 20cm
width = 4 cm (breadth)

Perimeter = 20
➡2(length+breadth) = 20
➡2(length + 4) = 20
➡length + 4 = 20/2
➡length + 4 = 10
➡length = 10 - 4
➡length = 6

length = 6 cm


Hope it helps.