A taper hole is inspected using a CMM, with a probe of 2 mm diameter. At a height, Z=10 mm from the bottom, 5 points are touched and a diameter of circle (not compensated for probe size) is obtained as 20 mm. similarly, a 40 mm diameter is obtained at a height Z=40 mm. The smaller diameter (in mm) of hole at Z=0 is

A taper hole is inspected using a CMM, with a probe of 2 mm diameter.

1.	A taper hole is inspected using a CMM, with a probe of 2 mm diameter. At a height, Z=10 mm from the bottom, 5 points are touched and a diameter of circle (not compensated for probe size) is obtained as 20 mm. similarly, a 40 mm diameter is obtained at a height Z=40 mm. The smaller diameter (in mm) of hole at Z=0 is
A.	13.334
B.	15.334
C.	15.442
D.	15.542
Answer» B. 15.334