Question

if two trainsbA and B running in the same direction at the rates of 54km/h and 42km/h have lengths 105m and 85m respectively, find time taken by to pass B completely​

Answer 1

Step-by-step explanation:

12km/hr is relative speed

12000/3600 m /sec

10/3m/sec

190m to be travel

190*3/10

57 second