Rachel drove 40 1/4 kilometres in 45 minutes. What was her average rate of speed in kilometres per hour? Choose the correct choice:
A) 52
B) 52 2/3
C) 53
D) 53 2/3
E) 54 1/3
53 2/3 = 40(1/4) = 161/4   T = 3/4   S = 53 2/3/T = 53 2/3   Answer = 53 2/3
<result>D</result>
Rachel drove 40 1/4 kilometres in 45 minutes. What was her average rate of speed in kilometres per hour?