This is a vector problem, draw the movements to scale on a piece of paper and with a rule, protractor and pencil you will have an extremely close to correct answer. This can then be used to verify the calculated answer that you come up with. By converting the points of origin, first turn point and last point from polar to rectangular and then back you will come up with a distance and direction from home! I do not have the relevant calculator these days to be able to help more. Some links below that i just looked up should help you, wish this technology was available when i was at school. PS I know i have not given the answer, however i think this will help you more than just answering the question for you. I forgot to mention that when you have the two individual movements in rectangular form you then add them together before you convert back to polar form for the answer that you seek.
Edit: New edit pending, i'm not happy with my last solution.
