Answer:
77.40
Explanation:
Initial width = 5.5 Inches
Initial length = 12.5 inches
Initial thickness = 1.085 inches
After grinding
Thickness of flat plate = 1 inch
Grinding wheel
starting diameter( di )= 6.013 inches
width of grinding wheel = 0.5 inch
After operation
Diameter of grinding wheel ( df ) = 5.997
<u>Calculate the grinding ratio in this operation</u>
First step : determine the volume of material removed from flat plate
= Length of flat plate * width of flat plate * change in thickness
= 12.5 * 5.5 * ( 1.085 - 1 )
= 5.8437 in^3
Volume of material from grinding wheel
= π / 4 * ( di^2 - df^2 ) * width
= π / 4 * ( 6.013^2 - 5.997^2 ) * 0.5
= 0.0755 in^3
<u>Finally the Grinding ratio</u>
= 5.8437 / 0.0755
= 77.4
