After cutting a 4-meter-long cylindrical timber into two equal sections, its surface area increases by 4.8 square decimeters. What is the original volume of the log

After cutting a 4-meter-long cylindrical timber into two equal sections, its surface area increases by 4.8 square decimeters. What is the original volume of the log

Analysis: if the wood is cut into two sections, the increased surface area is the two circular areas of the cutting surface
Area of cylinder bottom = 4.8 △ 2 = 2.4dm & # 178;
Log volume = bottom area × log length
=2.4×(4×10)
=96 DM³
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