How many miles are covered by the slower plane when they intersect?

Question

Two planes X and Y are 180 miles apart and moving from opposite directions at a rate of 20 km/hr and 30 km/hr, respectively. How many miles are covered by the slower plane when they intersect? Show solution. Another question. The distance from City A to City B is 120 miles. Mrs. Rivera drives at an average rate of 40 miles/hour and drives back at an average rate of 50 miles/hour. What is her average rate for the entire trip? Show solution

Answer 1

Solution:

https://ibb.co/k2Ysb5q

Comments

The server was not letting me write the solution here. It threw some javascript error, so I converted the answer into image and then uploaded here.