1.  A truck covers a distance of 550 metres in 1 minute where as a bus covers a distance of 33 kms in 45 minutes. The ratio of their speed is :
A. 3 : 4
B. 4 : 3
C. 3 : 5
D. 50 : 3

Answer: Option A

Explanation:

Ratio of speeds :
   = (550/60 x 18/5 ) : (33/45 x 60)
   = 33 : 44 = 3 : 4