Elise newman is Flying an airplane when the speed of the wind is 30 miles per hour. Elsie can travel 320 miles when flying with the wind in the same amountof time that she can travel 200 miles when fl

Elise newman is Flying an airplane when the speed of the wind is 30 miles per hour. Elsie can travel 320 miles when flying with the wind in the same amountof time that she can travel 200 miles when flying against the wind. Determine the speed of elise airplane in still air