math help?? multiple choice!!?

[skinniejeen?]

1. A plane flying with the wind traveled 1260 km in 2 hours. The return trip against the same wind took 3 hours. Find the rate of the plane in still air.

a. 495 km/h

b. 510 km/h

c. 515 km/h

d. 525 km/h

In the preceding problem, what was the rate of the wind? (Remember, a plane flying with the wind traveled 1260 km in 2 hours. Then, on the return trip against the wind, it took 3 hours to cover that distance.)

a. 105 km/h

b. 115 km/h

c. 120 km/h

d. 135 km/h

[shhrewd]

Set up a chart like the following
w= wind
x= rate of plane
Rate of plane * time= distance
x+w * 2 = 1260
x-w * 3= 1260

x+w=630
x-w= 420
2x= 1050
x= 525
D

2) x+w=630
525+w=630
w= 105
A