Question

A train 150m long crosses a plate form 450m long in 40seconds. Find the speed of the train in km per hour​

Answer 1

Answer:

the train 450m long crosses a pole in 22.5 seconds.

so the speed of the train is=2 x 450/22.5=40m/s

or 40 x 60 x 60/1000=144/kmhr.

Step-by-step explanation: