Ruchi.
arush sat down to study at 8 a.m. the angle of elevation of the sun was 15'.when he finished studying the angle of elevation of the sun was 55'.how long did arush study?
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Ruchi.
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@Hero @karatechopper
Ruchi.
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plz hlp me out today is my xam PSA
Ruchi.
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@sirm3d @onedirection822 @Weepdo-s @poopsiedoodle
Ruchi.
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timo u r writing something were that
timo86m
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|dw:1360980444964:dw|
timo86m
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be nice poopsie how the heck you become ambassador?
timo86m
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set a ratio original to new time
8/x=15/55
timo86m
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that reduces to
8/x = 3/11
timo86m
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or i think i did it wrong
timo86m
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is there more info ruchi?
Ruchi.
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yes option is also given
40 mins,
1hrs 20mins,
2hrs 23mins,
2hrs 40 mins
timo86m
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|dw:1360981152161:dw|
timo86m
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ruchi there should be a more info. other than choices.
Ruchi.
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no
timo86m
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i am confused perhabs if we divide the angle 360 into a 24 hour thingy.
so 360 degree= 24 hour
Ruchi.
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nt getting
timo86m
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ooh maybe the horizontal length is fixed and just the vertical varies.
timo86m
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|dw:1360981498364:dw|
Ruchi.
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hw to solve nt getting
richyw
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what latitude does he live in?
Ruchi.
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u can read question 4 that?
timo86m
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sorry i think we need more info.
richyw
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if you assume that the sun travels in an arc directly overhead then you can get the angular velocity of the sun as\[\omega=\frac{180^{\circ}}{12 \text{ hours}}=15^{\circ}/\text{h}\]then \[\Delta t=\frac{\Delta\theta}{w}=\frac{55^{\circ}-15^{\circ}}{15^{\circ}/h}=\frac{8}{3}h=160\text{ min}\]
richyw
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but here the sun is at 15 degrees at 8 am so the time zone are a bit messed up. I guess it is plausible as long as the area is right on the edge of a time zone, but you would expect the sun to rise and set around 6am and 6 pm.