1.

The perimeter of a room is 21 by 4 and the perimeter is 120 find the breadth

Answer» PERIMETER = 21/4
length = 120
breadth = ?
perimeter = 2×(l+b)

21 / 4 = 2 ( 120 + b)

21/ 4 × 2 = 120 + b

12 - 120 = b


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