Question

If the perimeter of a rectangular garden is 102 cm, then find the value of length if breadth is 20 cm.

Answer 1

P = 2(l+b)

L= x

b= 20 cm

P= 102 cm

102 = 2(x +20)

102 ÷2 = x +20

51 = x +20

51-20 = x

39 cm =x

Answer 2

Given, Perimeter = 102 cm

Breadth = 20 cm

Let length be x

Perimeter = 2(Length +Breadth)

102 = 2(x + 20)

102 = 2x + 40

2x = 102 - 40

2x = 62

x = 31

Thus, length is 31 cm.

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