Дано P=40H h=120см A-?

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вопрос

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.