Answer:
a)

b)

Step-by-step explanation:
From the question we are told that:
Cast-iron block Dimension:
Length

Width

Feed

Depth

Diameter

Number of cutting teeth

Rotation speed

Generally the equation for Approach is mathematically given by



Therefore
Effective length is given as



a)
Generally the equation for Machine Time is mathematically given by

Where



Therefore


b)
Generally the equation for Material Removal Rate. is mathematically given by


