Real-Life Math -- Solution
As the foreman of a moving crew, you are responsible for overseeing
the safe move of various structures.
Since you live in an area that
borders on the sea, you are sometimes asked to move marine vessels, or to
use marine vessels to move other structures. This typically requires that
you be able to perform basic mathematical calculations accurately and rapidly
while you are on the job.
This morning, for instance, your crew has
been sent to move a 90-ton submarine. You must jack the vessel up in the air,
fit dollies under it and truck it to a barge. To do this, you will have to
know the circumference and area of the vessel.
The submarine has a
diameter of 12 feet. What is the circumference? What is the area?
The formula to calculate circumference isx
diameter.
Circumference = pi x 12 feet
Circumference
= 3.14 x 12 feet
Circumference = 37.68 feet
Area
The
formula to calculate area isr2.
The
diameter is twice the radius (D = 2r). Therefore, the radius of the submarine
is 12 / 2 = 6 feet.
Area = 3.14 x (6 x 6)
Area
= 3.14 x 36
Area = 113.04 square feet
"Some
moves are complicated enough that you have to consult with structural engineers
before attempting the move," says mover Murray Nickel.