The perimeter of a rectangle is 42 and its lenght is xcm. Find its breadth in terms x
Let the breadth of the rectangle be y cm.
We know that the perimeter of a rectangle is 2(length + breadth).
Therefore,
2(x + y) = 42
x + y = 21
We also know that length (x) and breadth (y) are related by:
area = length x breadth
Since we don't know the area of the rectangle, we cannot solve for y exactly. However, we can express y in terms of x as follows:
y = (21 - x)
So, the breadth of the rectangle in terms of x is (21 - x) cm.