After four cubes of the same size are glued into a cuboid (as shown in the figure), the surface area is reduced by 54 square centimeters, and the surface area and volume of the cuboid are calculated
(1) (2) volume: 33 × 4, = 27 × 4, = 108 (cubic centimeter); answer: the surface area of cuboid is 162 square centimeter, the volume is 108 cubic centimeter
After four cubes of the same size are glued into a cuboid (as shown in the figure), the surface area is reduced by 54 square centimeters, and the surface area and volume of the cuboid are calculated
If the side length of a square is increased by 6 cm, its area will be increased by 96 square cm. What is its original area
96 △ 6 = 16 (CM) 16x16 = 256 (cm2)
The side length of a square is increased by 6cm, and the area is increased by 144cm. What is the original side length
Original side length = (144-6 × 6) △ 6 △ 2 = 9cm