Aplane flew 720 mi with a steady 30 mi/h tailwind. the pilot then returned to the starting point, flying against that same wind. if the round trip flight took 10 h, what was the plane's airspeed?

Plane's speed is 150 miles/hour

Step-by-step explanation:

Let the plane's airspeed be x

Speed of wind is 30 miles/hour

When a plane flew with the wind , Speed = (x+30)

So, the speed plain with wind on going = (x+30)

Since we are given that on returning plane fly against the wind .

So,When a plane flew against the wind , Speed = (x-30)

So, the speed plain against wind on returning = (x-30)

Distance = 720 miles .

So, time on going  

Time on returning  

Now we are given that the total time for the whole trip (going + returning) = 10 hours.

So,  

So, the plane's speed is 150 miles/hour

45

step-by-step explanation:

to find a percentage, add a decimal in front and multiply it by the other number.

.25 times 180= 45

answer:   c ?

step-by-step explanation: