A shadow moves around a sundail 15 degrees every hour

Mathematics
Tutor: None Selected Time limit: 1 Day

a. After how many hours is the angle of rotation of the shadow 8π/5 radians?

b. What is the angle or rotation after 7 hours?

c. A sundail has a radius of 8in. what is the arc formed by a shadow after 14 hours?

Jun 2nd, 2015

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a.8x180/5

288 degrees

288/15

=19.2 hours

b.15*7=105 degrees

c.15x14

210 degress

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Jun 2nd, 2015

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