Question

There's a problem in Halliday I - chapter 1
In my book it's question 19 (but it's a brasillian version). I'll try to translate it from portuguese :P
"Suppose you are laid at the beach, near the equator, looking the sun going down in a calm sea, and turns on a cronometer in the (exactly) moment that the sun dissapears. Then, you stand up, shifting (?) your eyes up a distance H=1.7m, and turns of the cronometers in the moment that the sun dissapears again. If the time appointed by the cronometer is t=11,1s, what is the radius of the Earth?"

Can someone help me, plese?

Answer 1

*turns off

Answer 2

Sorry, bad drawing. Better one coming: