For this case we have the following definition: d = v * t Where, d: distance v: speed t: time Clearing the time we have: t = d / v Substituting values: t = 1505/420 t = 3,583 hours Answer: Flight time hours: t = 3,583 hours
The answer is 3.58. The speed is 420 so divide the total amount of miles (1,505) with the average speed (420) and you get 1505/420=3.58. So it'll take 3.58 hours.