SOLUTION: The length of the minute hand of a clock is 9cm.find the distance travelled by the tip of the minute hand in 45 minutes. (Take pie 3.14)

Algebra ->  Trigonometry-basics -> SOLUTION: The length of the minute hand of a clock is 9cm.find the distance travelled by the tip of the minute hand in 45 minutes. (Take pie 3.14)       Log On


   

Question 1020022: The length of the minute hand of a clock is 9cm.find the distance travelled by the tip of the minute hand in 45 minutes. (Take pie 3.14)
Answer by Cromlix(4381) About Me  (Show Source):
You can put this solution on YOUR website!
Hi there,
45/60 = 3/4
3/4 x 360 degrees = 270 degrees
Formula
Angle/360 = Length of arc/Pi x diameter
270/360 = Length of arc/ 3.14 x 18cm
Length of arc = (270 x 3.14 x 18)/360
Distance traveled = 42.39 cm (2 decimal places)
Hope this helps :-)