Answers by visitors named: Malorie

Okay, velocity of air is 345.03 m/s and velocity of water is 1500m/s I did D=Va(t) D=345.03m/s(4.0s) and got 1380.12m Then: 1380.12m=1500m/s (t-4) and I got t=4.92s But then I don't know what to do after that