Question

A 10-ft bar of I-beam weighs 207 lb. What is the weight of a 12-ft length?

Answer 1

Solution:

Given:

$\begin{gathered} 10ft=207lb \\ 12ft=x \end{gathered}$

Cross multiplying the expression,

$\begin{gathered} 10\times x=12\times207 \\ 10x=2484 \\ x=\frac{2484}{10} \\ x=248.4lb \end{gathered}$

Therefore, the weight of 12-ft length is 248.4 lb