Wednesday

March 4, 2015

March 4, 2015

Posted by **G** on Tuesday, September 10, 2013 at 5:14pm.

- College Math -
**Reiny**, Tuesday, September 10, 2013 at 5:34pmspeed of plane in calm air --- x mph

time to go 460 miles with the wind = 460/(x+30)

time to go 310 miles against the wind = 310/(x-30)

they are equal, so

460/(x+30) = 310/(x-30)

460(x-30) = 310(x+30)

460x - 13800 = 210x + 9300

150x = 23100

x = 154

the speed of the plane is 154 mph

check:

speed with the wind = 184

time of trip against wind = 460/184 = 2.5 hours

speed against wind = 124 mph

time of trip against wind = 310/124 = 2.5 hours.

My answer is correct.

**Answer this Question**

**Related Questions**

Math - A plane flys 425 miles with the wind and 350 miles against the wind in ...

math - a plane traveled 3927 miles with the wind in 7 hours and 3437 miles ...

algebra (21) - A polot flies 630 miles wit a tail wind of 35 miles per hour. ...

algebra - A Boeing 747 flies 2420 miles with the wind. In the same amount of ...

math - An airplane flying against the wind travels 100 miles in the same amount ...

algebra - A plane takes 3 hours to travel 1500 miles with the wind. it can ...

Algebra - How do you sole the problem below? Kevin flies a plane against a ...

math - A pilot can travel 400 miles with the wind in the same amount of time as ...

math - A pilot can fly an MD-11 2160 miles with the wind in the same time she ...

Algebra - An airplane traveled 1092 miles with a tailwind, turned around and ...