Use the pythagorean theorem to calculate it.
The lenght of the shadow will be 12.6 ft
That all depends upon what time of day the shadow was cast. For example, at straight up noon, even a very tall building wouldn't cast much of a shadow, but at sunrise or sunset, even a tiny building might cast an 18 foot long shadow, or even longer.
48
It works out as 30 feet in height
That varies depending on the height of the sun, whether the shadow is cast on a sloping surface and so forth.
To cast a 19 foot shadow the building would have to be 26.91 feet tall. Each foot of building/tree casts 8.47 inches of shadow.
The lenght of the shadow will be 12.6 ft
That all depends upon what time of day the shadow was cast. For example, at straight up noon, even a very tall building wouldn't cast much of a shadow, but at sunrise or sunset, even a tiny building might cast an 18 foot long shadow, or even longer.
(18/16)x40=45
48
208 ft pole
The man is twice as high as his shadow. Therefore, the tree must also be twice as high as its shadow, which would make the tree 40 feet tall.
The tree was 20 feet tall.
25 ft
It works out as 30 feet in height
That varies depending on the height of the sun, whether the shadow is cast on a sloping surface and so forth.
If a 27 ft tall pole casts an 18 foot shadow, a 63 ft tall pole casts an x foot shadow.Put 27/18 and 63/x.Cross multiply, get 27x=1134Divide by 27 on both sides, a 63 foot tall pole casts a 42 foot long shadow.