1. Assignment
A small jet has an airspeed (the rate in still air) of 300 mi/h. During one day’s flights, the pilot noted that the plane could fly 85 mi with a tailwind in the same time it took to fly 65 mi against that same wind. What was the rate of the wind? 4. With only the small valve open, all of the liquid can be drained from a large vat in 4 hours. With only the large valve open, all of the liquid can be drained from the same vat in 2 hours. How long would it take to drain the vat with both valves open? 5. Kiyoshi can paint a certain fence in3 hours by himself. If Red helps, the job takes only 2 hours. How long would it take Red to paint the fence by himself ?

2. PAP Assignment
A small jet has an airspeed (the rate in still air) of 300 mi/h. During one day’s flights, the pilot noted that the plane could fly 85 mi with a tailwind in the same time it took to fly 65 mi against that same wind. What was the rate of the wind? 4. With only the small valve open, all of the liquid can be drained from a large vat in 4 hours. With only the large valve open, all of the liquid can be drained from the same vat in 2 hours. How long would it take to drain the vat with both valves open? 5. Kiyoshi can paint a certain fence in3 hours by himself. If Red helps, the job takes only2 hours. How long would it take Red to paint the fence by himself ?