Multiple Choice Question (MCQ)
Question: What is the recommended cutting speed for turning mild steel using H.S.S tool?
A.
25-40 m/min
B.
35-70 m/min
C.
40-70 m/min
D.
35-50 m/min
Correct Answer: 35-50 m/min
Explanation
Given : perimeter of arc is 64.8cm and radius is 12.4 cm
To find : length of arc of sector
Solution:
Perimeter of an arc = radius + arc length + radius
Perimeter of arc = 64.8 cm
radius = 12.4 cm
64.8 = 12.4 + arc length + 12.4
64.8 = 24.8 + arc length
arc length = 40 cm