Posted by Mindy on Sunday, January 10, 2010 at 7:27pm.
The strength of a cable is proportional to the square of its diameter. If a 2cm cable will support 800kg, how much will a 3cm cable support?

Math  bobpursley, Sunday, January 10, 2010 at 7:49pm
T=constant*dia^2
800=k*2^2
T3=k*9
divide one equation by the other
T/800= 9/4
solve for T