50 yard freestyle 22.17 seconds
100 yard backstroke
53.83 seconds
100 yard butterfly
58.49 seconds

What was the difference between the winning butterfly time and the winning backstroke time?

The winning time for the 100 yard freestyle was twice the time for the 50 yard freestyle. What was the winning time for the 100 yard freestyle?

What was the difference between the winning 100 yard freestyle time and the winning butterfly time?

A pickup truck carrying 10*3 identical bricks weighs 6,755 pounds. If the empty truck weighs 6,240 pounds, what is the weight of each brick? Explain how you solved the problem.