The length of a rectangular plot is 12m and the perimeter is 60m. Find the width of the rectangular block.
Let the width of the rectangle = y
Perimeter of the rectangle = 2(l+b)
60 =12 + 12 + y + y
60 =2(12 +y)
30 = (12 + y)
y = 18
So, the width of the rectangular block is 18 m.