Question

A train 350 m long crosses an electric pole in 28 seconds. Find the speed of the train in km/hour.

Answer 1

Answer:

45 km / hr

Step-by-step explanation:

350 m = 7/20 km

28 sec = 7/900 Hr

Speed = (7/20) / (7/900)

           = 45 Km / Hr

Answer 2

Step-by-step explanation:

d=350 m

t=28sec

∴ speed =

t

d

∴ speed =

28

350

m/sec

∴ speed =

4

50

m/sec

∴ speed =12.5 m/s

∴ speed =

5

18

×

4

50

km/hr

∴ speed =

4

180

km/hr

∴ speed =45 km/hr