Firefighter hose must be fired from a distance because of some obstacles if the water spiller city is 30 m/s angled 45 degrees reaches the source of the fire in 3.5 s, how far is the firefighter from the fire

Answer 1

"spiller city" ... ? ... velocity ?

horizontal component of velocity ... cos(45º) * 30 m/s = vh

distance = vh * 3.5 s

Answer 2

R_scott is right,this is a very intelligent solution.