A cylinder has a side area of 47.1 square decimeters and a height of 5 decimeters. Its surface area is___ Square decimeter, volume is___ Cubic decimeter

A cylinder has a side area of 47.1 square decimeters and a height of 5 decimeters. Its surface area is___ Square decimeter, volume is___ Cubic decimeter

(47.1 △ 5) △ 3.14 × 2, = 9.42 △ 6.28, = 1.5 (decimeter); 47.1 + 3.14 × 1.52 × 2, = 47.1 + 3.14 × 4.5, = 47.1 + 14.13, = 61.23 (square decimeter); 3.14 × 1.52 × 5, = 3.14 × 2.25 × 5, = 35.325 (cubic decimeter); a: its surface area is 61.23 square decimeter, and its volume is 35.325 cubic decimeter

If the height of a cuboid is reduced by 2 cm to become a cube, the surface area will be reduced by 48 square cm, and the volume of the cube is () cubic cm
A. 216B. 96C. 288D. 72

The original cuboid bottom side length is: 48 △ 4 △ 2, = 12 △ 2, = 6 (CM), the cuboid volume is: 6 × 6 × 6 = 216 (cm3); answer: the cuboid volume is 216 cm3

When the height of a cuboid is reduced by 3 cm, its surface area is reduced by 48 square cm to become a cube. The volume of a cube is______ Cubic centimeter

The original length of the bottom side of the cuboid is: 48 ﹣ 4 ﹣ 3 = 12 ﹣ 3 = 4 (CM). The volume of the cube is 4 × 4 × 4 = 64 cubic cm. A: the volume of the cube is 64 cubic cm. So the answer is: 64