The area of the rectangle is 2 / 5 square meters, and the area of the shadow part is 2 / 5 of the area of the rectangle

Area of Shadow: 2 / 5 * 2 / 5 = 4 / 25 (M2)
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1. The shadow accounts for two fifths of the triangle and three twentieth of the rectangle. The area of the triangle is 40 square centimeters less than that of the rectangle. What is the area of the rectangle
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