I'm certain that is a typo. I'm guessing it
should have been 2.3 m. If those numbers were correct, the tree is 30 feet tall and 75 feet around. You can imagine this would be nearly impossible.
A quick search found this:
"Coast redwood is the tallest tree in the world, but also the girth of its trunk is very large. Del Norte Titan has the largest circumference of single trunk in this species – 22.73 m.
Del Norte Titan was discovered on May 11, 1998 and this beautiful tree has the fourth largest volume of
wood in the world.
Serious contender to the title of stoutest redwood is Lost Monarch just across the nearby Mill Creek. This giant tree has larger circumference (24.13 m), it is also taller – fantastic 97.84 m and has larger wood volume. Nevertheless its circumference includes several trunks."
The world record for a single trunk tree is 22.73 m.
I have mulberry trees and they grow very fast. It isn't hard to believe on would reach 30 feet tall in a few years.