Answer:
15cm
Explanation:
the formula for calculating the perimeter of a rectangle is (length + breadth) ÷ 2. so, we can divide the given perimeter by 2 to find the sum of the length and breadth of the rectangle:
42 ÷ 2 = 21cm
now, since we know the length of the rectangle is 6cm, we can subtract it from the sum of the length and breadth:
21 - 6 = 15cm
thus, the breadth of the rectangle is 15cm.
i hope this helps! :D
