## 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? one year ago one year ago

1. Ruchi.

@Hero @karatechopper

2. Ruchi.

plz hlp me out today is my xam PSA

3. Ruchi.

@sirm3d @onedirection822 @Weepdo-s @poopsiedoodle

4. Ruchi.

timo u r writing something were that

5. timo86m

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6. timo86m

be nice poopsie how the heck you become ambassador?

7. timo86m

set a ratio original to new time 8/x=15/55

8. timo86m

that reduces to 8/x = 3/11

9. timo86m

or i think i did it wrong

10. timo86m

11. Ruchi.

yes option is also given 40 mins, 1hrs 20mins, 2hrs 23mins, 2hrs 40 mins

12. timo86m

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13. timo86m

14. Ruchi.

no

15. timo86m

i am confused perhabs if we divide the angle 360 into a 24 hour thingy. so 360 degree= 24 hour

16. Ruchi.

nt getting

17. timo86m

ooh maybe the horizontal length is fixed and just the vertical varies.

18. timo86m

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19. Ruchi.

hw to solve nt getting

20. richyw

what latitude does he live in?

21. Ruchi.

u can read question 4 that?

22. timo86m

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 $\Delta t=\frac{\Delta\theta}{w}=\frac{55^{\circ}-15^{\circ}}{15^{\circ}/h}=\frac{8}{3}h=160\text{ min}$