A log is 6 meters long. If you cut off a log of 6 decimeters, the surface area will be reduced by 18.84 square decimeters. What is the volume of the log

A log is 6 meters long. If you cut off a log of 6 decimeters, the surface area will be reduced by 18.84 square decimeters. What is the volume of the log

Hello, lovemi
Perimeter of bottom surface:
18.84 △ 6 = 3.14 (decimeter)
Bottom radius:
3.14 △ 3.14 △ 2 = 0.5 (decimeter)
The log length is:
6m = 60m
Log volume:
3.14 × 0.5 × 0.5 × 60 = 47.1 (cubic decimeter)