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mindauggas
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Homework Statement
A 300-foot-long cable, originally of diameter 5 inches, is submerged in seawater. Because of corrosion, the
surface area of the cable diminishes at the rate of 1250 in 2 /year. Express the diameter d of the cable as a
function of time t (in years).
Homework Equations
C=π*d
Surface area=C*length (in inches)
The Attempt at a Solution
I understand (I hope correctly) that the form of the equation has to be
[itex]d=initial value - the rate of deminution[/itex] , hence
[itex]d=5 - the rate of diminution[/itex]
How do I construct the formula for the rate of diminution?
[itex]\frac{πd*l}{1250*t}[/itex] ?