chie left home and ran north for 20 minutes at 10 km/h and then turned north east for 35 minutes at 5 km/h. how far (km) was she away from home after the run?

Answer 1

d1 = 10km/h * (20/60)h = 3.33 km., N.

d2 = 5km/h * (35/60)h=2.92 km, NE.(45o)=
2.06 + 2.06i.

Disp.=2.06 + 2.06i + 3.33i=2.06 + 5.39i
= sqrt(2.06^2 + 5.39^2)