When the height of a rectangle is increased by 3 dm, it becomes a cube. The surface area of this cube is increased by 48 dm2 compared with that of the original cube. Formula ~

The added area is equal to the sum of the 4 side products of 3 in height
Bottom side length=48÷4÷3=4 decimeter
Original height =4-3=1 decimeter
Original volume:4×4×1=16 cm3

The added area is equal to the sum of the 4 side products of 3
Bottom side length=48÷4÷3=4 decimeter
Original height =4-3=1 decimeter
Original volume:4×4×1=16 cm3

When the height of a cube is increased by 3 dm, a cube is obtained, and its surface area is increased by 48 dm compared with that of the original cube. How long is it?

48÷4÷3=4(Decimeters)

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