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First, put six identical cubes into a cuboid (horizontally, three in front and three in back, because there is no picture, so it is). The surface area of this cuboid is 220 square centimeters. How many square centimeters is the surface area of each cube? Second: the edge length of a cube glass fish tank is 6 decimeters. How many square decimeters does it need to make the fish tank? How much space does the fish tank occupy? (there is no cover on the fish tank) Third: Shanghai Oriental Pearl TV Tower is 468 meters high, 31 times higher than the average residential building 3 meters. How many meters is this ordinary residential building? Fourth: Mr. Li can type 80 words per minute. Mr. Zhang's typing speed is 3 / 4 of that of Mr. Li and 5 / 6 of that of Mr. Huang. How many words can Mr. Huang type per minute?
1. Let the side of the square be x, the surface area of the rectangle be 2x * 3x * 2 + X * 3x * 2 + X * 2x * 2 = 220, x = root 10, then the surface area of the square be 6x square = 60 square centimeter. 2. There is no cover on the fish tank, so it has five faces, 5 × 6 × 6 = 180 square decimeter, and the space is 6 × 6 × 6 = 216 cubic decimeter
Trouble to solve a few math problems, huh?
6 and 1 / 4 - √ 0.64
√ 3 ＋ 8 ＋ 4 - √ 27 (accurate to 0.01)
√ 6 and 1 / 4 - √ 0.64 = √ 6 / 4-0.8 = -0.19
√3＋√8＋√4－√27=√3+2√2+2-3√3=2*1.414+2-2*1.732=1.36
A small math problem. Thank you
If the bottom area and volume of a cylinder, a cone and a cuboid are respectively equal, then the height of cuboid is the height of cylinder (); the height of cuboid is the height of cone (); the height of cone is the height of cylinder ()
If the bottom area and volume of a cylinder, a cone and a cuboid are respectively equal, then the height of cuboid is equal to that of cylinder; the height of cuboid is 1 / 3 of that of cone; the height of cone is 3 times of that of cylinder
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