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
"spiller city" ... ? ... velocity ?
horizontal component of velocity ... cos(45º) * 30 m/s = vh
distance = vh * 3.5 s