Question

A. 55 mi North

B. 90 km/h north
C. 90 km
D. 55mph​

Which of the following is an expression of speed

Answer 1

A. Displacement

B. Velocity

C. Distance or length

D. Speed

Answer 2

Answer: The correct answer is D. 55mph

Explanation: The speed is a scalar quantity. A scalar doesn't specify a direction whereas B. Specify direction the other units are not for velocity or speed.