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The surface area of a 2-meter-long log increases by 48CM after it is cut into three sections. The original volume of the log is () cm
It takes two cuts to cut into three sections
Each knife adds two sections
So two knives add four sections
The area of the four sections is 48CM;,
Therefore, the cross-sectional area is 48 / 4 = 12cm and 178;,
V=12*2=24cm³
If you still have doubts, please ask
If a log with a length of 2m is cut into two cylindrical sections, its surface area will increase by 628cm;
Formula
The increased surface area is the size of two bottom areas, so: bottom area = 628 △ 2 = 314 square centimeter, volume = bottom area × length = 314 × (2 × 100) = 62800 cubic centimeter ~ Yike forever 523 answers for you, I wish you progress in your study ~ ~ ~ if you agree with my answer, please click the [adopt as satisfactory answer] button in time ~ ~ mobile phone
A 1-meter-long cylinder wood is cut into three small logs, and the sum of the surface area of the three small cylinders is 8dm ᦇ 178 larger than that of the original wood
What is the sum of the volume of a small cylinder
After truncation, two circular faces will be added in the middle section, one at both ends, and a total of four faces will be added
The sum of the areas of these four surfaces is 8dm & # 178; one surface is 2DM & # 178; = 0.02 m2. The area of these circular surfaces is the same as that of the bottom surface
Volume is bottom area × height volume = 0.02 * 1 = 0.02 cubic meters
Cut a 4-meter-long log into three small sections, and increase the surface area by 16 square decimeters. The original volume of this log is ()
A. 160dm3B. 24dm3C. 32dm3D. 64dm3
4 meters = 40 decimeters, 16 △ 4 × 40 = 160 (cubic decimeters), so a
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