Question

A carbon brush measures 23/32 inch thick and 1 15/32 inches wide.It is to have a copper plating on all sides 0.015 inch thick. What will be the finished width in decimal form of the brush with the copper plating?

Answer 1

Answer:

1.49875 inches

Explanation:

First, we need to convert the width of 1 15/32 inches to decimal as follows

$1\frac{15}{32}\text{ = 1+}\frac{15}{32}=1+0.46875=1.46875\text{ inches}$

Then, Since it will have a copper plating of 0.015 inches, the width will increase by twice this measure, so the new width will be

1.46875 + 2(0.015) = 1.49875 inches

Therefore, the answer is 1.49875 inches