Posted by **Jack** on Wednesday, September 8, 2010 at 9:17pm.

The strength of a cable is proportional to the square of its diameter. If a 2-cm cable will support 800kg, how much will a 3-cm cable support?

- Pre Calculus -
**MathMate**, Wednesday, September 8, 2010 at 10:29pm
"The strength of a cable is proportional to the square of its diameter."

A 2-cm cable has a diameter of 2 cm, and a 3-cm cable has a diameter of 3 cm.

If a 2-cm cable supports 800kg, so a 3-cm cable supports:

800*(3/2)²

=?

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