A cuboid reduces its height by 3cm and becomes a cube. Its surface area is reduced by 24cm square. The volume of the original cuboid is () The ratio of length to width of a rectangle is 7:3. If the length is reduced by 12cm and the width is increased by 16cm, it will become a square. What is the area of the original rectangle () square centimeter

A cuboid reduces its height by 3cm and becomes a cube. Its surface area is reduced by 24cm square. The volume of the original cuboid is () The ratio of length to width of a rectangle is 7:3. If the length is reduced by 12cm and the width is increased by 16cm, it will become a square. What is the area of the original rectangle () square centimeter

24 △ 4 △ 3 = 2 cm (edge length)
Volume = 2 × 2 × (2 + 3) = 20 cc
（12+16）÷（7-3）=7
Length: 7 × 7 = 49 (CM) width: 7 × 3 = 21 (CM)
Area: 49 × 21 = 1029 (square centimeter)