To find the value of A, we first need to identify the formula that relates the variables P, h, and A. In this case, the formula for the perimeter (P) of a rectangle is P = 2(l + w), where l is the length and w is the width of the rectangle.
Given that P = 40H and h = 120 cm, we can rearrange the formula to solve for the width (w) in terms of H:
40H = 2(l + w) 20H = l + w 20H = w + 120 cm
Since the width (w) is equal to A in this case, we can substitute w = A into the equation:
To find the value of A, we first need to identify the formula that relates the variables P, h, and A. In this case, the formula for the perimeter (P) of a rectangle is P = 2(l + w), where l is the length and w is the width of the rectangle.
Given that P = 40H and h = 120 cm, we can rearrange the formula to solve for the width (w) in terms of H:
40H = 2(l + w)
20H = l + w
20H = w + 120 cm
Since the width (w) is equal to A in this case, we can substitute w = A into the equation:
20H = A + 120 cm
A = 20H - 120
Therefore, the value of A is 20H - 120.