Question

A Boeing 747 flies 2420 miles with the wind. In the same amount of time, it can fly 2140 miles against the wind. The cruising speed ( in still air) is 570 mph. Find the speed of the wind.
time with the wind = 2420/(570+x)
time against the wind = 2140/(570-x)
but these two times are equal

2420/(570+x) = 2140/(570-x)
1219800 + 2140x = 1379400 - 2420x
4560x = 159600
x = 35

the speed of the wind is 35 mph

Related Questions

A polot flies 630 miles wit a tail wind of 35 miles per hour. Against the wind, he flies only 455 m... A plane flies with a ground speed of 160 miles per hour if there is no wind. It travels 350 miles wi... A jet flies from Atlanta to Dubuque a distance of 900 miles. After traveling the same amount of time... It took a manticore the same amount of time to fly 10 miles with the wind as 5 miles against the w...