Question

An audio cable is 14.9dm long. How long is the cable in meters?Be sure to include the correct unit in your answer.

Answer 1

To answer the question we need to remember that the "d" before the meters measn denotes a factor of a tenth, that is:

$d=10^{-1}$

Hence we have:

$14.9dm=14.9\times10^{-1}m=1.49m$

Therefore, the cable is 1.49 m long