1. 1. To get to a concert in time, a harpsichordist has to drive 124 miles in 2.01 hours. (a) If he drove at an average speed of 53.0 mi/h in a due west direction for the first 1.18 h, what must be his average speed if he is heading 30.0° south of west for the remaining 49.8 min? (b) What is his average velocity for the entire trip? 2. Equations: avg velocity = Δr/Δt avg speed = distance traveled/time of trip 3. I am confused at how to calculate average speed in this problem..do you take the -cos (30.0) 53.0 mi = -45.8 mi for the x component and sin (30.0) 53.0 mi = 26.0 mi for the y component and plug them into the pythagorean theorum = -45.8 mi^2 + 26.0 mi ^2 = 2799.89 mi and take the square root which is = 52.9 mi and divide that by .83 hrs = 63.7 mi/hr b/c 49.8 min is = 0.83 hr Am I doing this wrong? I'm not sure how to calculate the average velocity for this problem. Could someone please explain what I am doing wrong b/c the whole 30 degree angle in the problem throws me off.