Average speed = (total distance) / (time to cover the distance)
Average speed = (3.4 km) / (1 hour) = 3.4 km · hr⁻¹
Average velocity =
(straight-line distance between start- and end-point) / (travel time)
+ direction from start-point to end-point
Straight-line distance between R and T is
√ [ (2.4 km)² + (1.0 km)² ]
= √ (6.76 km²) = 2.6 km .
direction = 22.6° west of south
Average velocity = 2.6 km · hr⁻¹ on a heading of 22.6° west of south
Line-E is the correct choice from the table.