Question

@ Speed of Lorry = 20m/s
speed of bus = 40kmph. what is the speed of the lorry​

Answer 1

Hey mate you have already stated the speed of the lorry I think that the question is about of the speed in km/h.

So, the speed of the lorry in km/h is= (20*18/5) km/h

                                                           = (4*18)km/h

                                                           = 72 km/h.