Question

A moves with 65 km/h while B is coming back of A with 80 km/h. The relative velocity of B with respect to A is

• A. 80 km/h
• B. 60 km/h
• C. 15 km/h
• D. 145 km/h

Answer 1

Answer: (C)

15 km/h

Answer 2

${\overrightarrow{v}}_{B} + {\overrightarrow{v}}_{A} =$ ${\overrightarrow{v}}_{B} + {\overrightarrow{v}}_{A} = 80 + 65 = 145km ⥂ / ⥂ hr$