Zilong can complete a task 8 hours sooner than Saber. Working together, both people can perform the task in 3 hours. How many hours does it take for each person to complete the task working alone?
EXPLAIN THE PROCESS OF HOW YOU SOLVE THE FOLLOWING PROBLEM.
I. Zilong can complete a task 8 hours sooner than Saber. Working together, both people can
perform the task in 3 hours. How many hours does it take for each person to complete the
task working alone?
II. The speed of a passenger train is 12 mph faster than the speed of the freight train. The
passenger train travels 330 miles in the same time it takes the freight train to travel 270
miles. Find the speed of each train.
solve the following probelm. Show your solution
1. Miguel and Francis can clean their backyard in 4 hours. It takes Miguel 7 hours to do the job
alone. How long would it take Francis to do the same job?
2. the age of Joshua's father is twice Joshua's age. In eight years, the ratio of Joshua's age to his fathers age will be 4/7. Find their present ages.
3. Two trains leave at the same time and move in opposite directions. One train can travels 25
kph faster than the other. Six hours later, the two trains are 725 kilometers apart. Find the rate of each train.
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