How do you calculate tension in the string?

[hellokitty]

Homework Statement

A guitar string with a linear density of 2.0 g/m is stretched between supports that are 60 cm apart. The string is observed to form a standing wave with three antinodes when driven at a frequency of 420 Hz.

What is the tension in the string?

 

[hage567]

Please show us what you've tried so far.

 

[hellokitty]

I don't have any formulas to even begin solving the problem. i just know f= v/x an f= 1/period? My book does not have any formulas pertaining to tension and the teacher never taught us this information.

 

[hage567]

Read through this page and see if helps get you started: http://hyperphysics.phy-astr.gsu.edu/hbase/waves/string.html#c1