text: This is easy.  The displacement is sqrt(2450^2 + 2430^2) = 10 sqrt(245^2 + 243^2) = 3451 m, so the average velocity is 230 m/s.  (You had to divide by 15.)\n\nFor the angle, tan x = -243/245 = -0.99184\n\nThe angle is -44 degrees, 46 minutes