Final answer:
The plane's velocity with the wind is 4000mph eastward, obtained by adding the airplane's velocity of 2500mph to the wind's velocity of 1500mph.
Step-by-step explanation:
If an airplane is traveling east with a velocity of 2500mph and the wind is blowing east at 1500mph, the velocity of the plane with the wind is obtained by simply adding the airplane's velocity to the wind's velocity. In this case, the calculation would be:
Airplane's Velocity + Wind's Velocity = Total Velocity
2500mph + 1500mph = 4000mph
The plane's velocity with the wind would be 4000mph eastward. This is because when the wind's direction is the same as the plane's direction, they add together to give the total velocity of the plane relative to the ground.