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Sophie [7]
3 years ago
12

The circular blade on a saw has a diameter of 7.5 inches and rotates at 2400 revolutions per minute.

Mathematics
1 answer:
Archy [21]3 years ago
4 0
For a:
    
       (2400*2*PI)/60(seconds) = 80 PI RAD/Sec

For b: 
   
        arc length s= radius r * central angle(in radians) 

                          = ((80*pi*7.5)/(2*pi)
                          =25


                          



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