Question

two airplanes leave an airport at the same time and travel opposite directions. one plane travels 81 km/h slower than the other. If the two planes are 6140 km apart after 4 hours, what is the rate of each plane?

Answer 1

The speed of the faster plane is 899 km/hr

The speed of the slower plane is 824 km/hr

Explanation:

Equation for faster plane:

(1) +d+=+s%2A4+

Equation for slower plane:

(2) +6892+-+d+=+%28+s+-+75+%29%2A4+