Current location - Training Enrollment Network - Mathematics courses - People's education edition, the first volume of seventh grade mathematics, chapter 3, the answer to the exercise 3.3 7.
People's education edition, the first volume of seventh grade mathematics, chapter 3, the answer to the exercise 3.3 7.
Solution: let the aircraft speed be X km/h when there is no wind.

17

2 hours and 50 minutes =-hour

six

17

——(x+24)=3(x-24)

six

x=840

3 (x-24)

=3(840-24)

=2520-72

=2448

A: When there is no wind, the speed of the plane is 840/ h, and the distance between the two cities is 2448 kilometers.