Question

A wooden plank is $5$ feet long and $1\frac{1}{2}$ inches thick. To make the plank $1\frac{1}{8}$ inches thick, a carpenter removes the same thickness of wood from the top and bottom of the plank. How many inches does the carpenter remove from the top of the plank

Answer 1

Carpenter remove $3/16$ inches from the top of the plank to the same thickness of wood from the top and bottom of the plank.

How many inches does the carpenter remove from the top of the plank ?

A wooden plank is $5ft$ long and $1\frac{1}{2}$ inches thick

to make the plank $1\frac{1}{8}$ inches thick

Carpenter needs  to cut off

$=1\frac{1}{2} -1\frac{1}{8} \\=\frac{3}{2} -\frac{9}{8} \\=\frac{3}{8}$

Carpenter cuts each side

$=\frac{3}{8} /2\\=\frac{3}{16} inches$

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