Given the stream of consciousness rationale, provide a reasonable question and answer. Rationale: S = (90 + 60)/2 = 75 kmph
The question and answer:
The speed of a car is 90 km in the first hour and 60 km in the second hour. What is the average speed of the car?
Options:
(A) 228
(B) 75
(C) 299
(D) 267
(E) 312
The answer is (B)