Question

solve the linear equation by using cross multiplication method
5x+2y=10 ; 3x+6y/5=2​

Answer 1

Step-by-step explanation:

Velocity    v=30 km/h=30×185=8.3 m/s

Time taken to cross    t=36 s

Let the length of bridge be L.

Distance covered by train to cross  d=50+L

So,     L+50=36×8.3

⟹ L≈250 m