Question

A train moving by constant speed 54 km/h. what is speed of the train in m/sec.

Answer 1

change km into metres.

1km = 1000 m

change hr into sec.

1hr = 3600 s

now , 1km/hr =1000m/3600s = 5/18 m/s

using this general expression you can convert km/hr into m/s & reverse.

now , 54 ×5/18 = 15m/s.

Answer 2

Answer:

15 M/S

Explanation:

WHEN YOU WANT TO CONVERT KM/H INTO M/S MULTIPLY THE SPEED BY 5/18 AND ADD UNIT AS M/S.

AND WHEN YOU CONVERT M/S INTO KM/H MULTIPLY THE SPEED BY 18/5 AND ADD THE UNIT KM/ H. ALWAYS REMEMBER THIS TRICK TO GET YOUR ANSWER VERY FAST IN PHYSICS.

GOING BY THIS YOUR ANS.= 15 M/S