If a 2 x 6 board (which means the actual dimensions of the board are 1.5 in. x 5.5 in.) milled from the same wood (and therefore has the same density) weighs 3.2 lb, how long is the board?

18.5 in

Step-by-step explanation:

Let x be the length of board.

Actual width of board,b=1.5 in

Height of board,h==5.5 in

Density of wood=0.021lb/cubic in

Weight of wood=3.2 lbs

We know that

Volume=

By using the formula

Volume of wood=

Volume of wood=

Using the formula

Hence, the length of board=18.5 in

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step-by-step explanation: