A truck covers a distance of 550 metres in 1 minute whereas a bus covers a distance of 33kms in 45minutes. The ratio of their speeds is?  Choose the correct choice from the following options:
A) 1:2	B) 3:4	C) 2:5	D) 3:7	E) 1:3
Ratio of speeds = (550/60) 18/5 : 60*33/45 = 33:44 = 3:4   Answer is 3:4
<result>B</result>
A truck covers a distance of 550 metres in 1 minute whereas a bus covers a distance of 33kms in 45minutes. The ratio of their speeds is?