| Answer:
Only the coast
redwood and the giant
sequoia are clearly big enough.
If two-feet "walls" are
enough to hold up the tree around a six-foot wide car,
then the black willow, the coast Douglas fir, the sugar
pine, and the white oak are big enough as well. |
|
Complete Solution:
To find the diameter of a circle
when you know the circumference, you divide the circumference
by  (pi,
about 3.14). For example, the black willow has a girth
of 400 inches and since 400 ÷ 3.14 is about 127, the
black willow is about 127 inches wide, enough for a car
to drive through and still leave at least 2 feet on each
side.
| Tree |
Girth
(4.5 ft above ground in inches) |
Diameter
(girth ÷  ) |
Height
(in feet) |
| American
Beech |
279 |
89 |
115 |
| Black
Willow |
400 |
127 |
76 |
| Coast
Douglas Fir |
438 |
139 |
329 |
| Coast
Redwood |
867 |
276 |
313 |
| Giant
Sequoia |
998 |
318 |
275 |
| Loblolly
Pine |
188 |
60 |
148 |
| Pinyon
Pine |
213 |
68 |
69 |
| Sugar
Maple |
274 |
87 |
65 |
| Sugar
Pine |
442 |
141 |
232 |
| White
Oak |
382 |
122 |
96 |
|
|
