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