Botfly crushed between two trains in collision - BARC Finals

Basic Algebra Review Course (BARC) Link to BARC: https://mathalino.com/node/18037 LINK TO FINAL EXAM This is one of the problems in the Final Exam of Basic Algebra Review Course at MATHalino. We suggest you take the exam first before watching this video. Go to https://mathalino.com/node/18159 and click the Take tab to start the exam. Registration is optional. IN THIS VIDEO: Stations A and B are 120 miles apart on a single-track railroad. At the same time that a train leaves A for B at 25 mph, a train leaves B for A at 15 mph. Just as the train leaves A, a botfly flies from the front of the engine straight toward the other train at 100 mph. On meeting the second train it immediately turns back and flies straight for the first train. It continuous to fly back and forth with undiminished speed until it is crushed in the eventual collision. How far had the fly flown? SOLUTION TO FINAL EXAM Equilateral triangles:    • Sum of Areas of Equilateral Triangles Insc...   Leaps of cat and dog:    • Number of leaps needed for the dog to catc...   Phone numbers:    • Number of Seven-Digit Phone Numbers for a ...   Red and black socks:    • Probability: Red and Black Socks in Drawer...   Steps on escalator:    • Number of Steps On The Escalator: M. Poiro...   Truth serum:    • Conditional Probability: Innocent Tagged G...   Taller and heavier husbands:    • Husbands who are taller and heavier than t...   Substance into a solution:    • Substance Goes Into a Solution at a Consta...   Car nearly hit me:    • A car nearly hit me! - BARC Finals   Guessing the exam:    • Probability to correctly guess 25 to 30 it...   Alcohols to minors:    • Probability: Alcoholic drinks served to mi...   Snatchers are addicts:    • Probability: Snatchers are Drug Addicts? -...   Monthly dues of condo:    • Probability: Increase in monthly dues of c...   Two-stage missile:    • Conditional Probability: Two-stage Missile...   Arrived early by train:    • A man arrived too early by train and start...   Triangle from square lot:    • Neighbor ask to buy a triangular area from...   Bike and motorcycle:    • Bike and motorcycle in opposite directions...   Unbalanced coin:    • Probability: Unbalanced Coin - BARC Finals   Two kinds of sherry:    • Mixture Problems: Two kinds of sherry - BA...   Spider and fly:    • Probability: Survival of a fly that attemp...   Odd man pays the coffee:    • Probability: The odd man pays for the coff...   Final Age of Man:    • Final Age of Man - BARC Finals   Rain or no rain:    • Rain or no rain: local vs federal weather ...   Sitting in round table:    • Man and wife invited 8 friends to sit arou...   Line and parabola:    • No common point for a line and parabola - ...   Contractor with 50 men:    • Contractor put 20 additional men to a proj...   Time between 2 and 3:    • Time between 2 and 3 o'clock when the angl...   The king's minter:    • The king's minter puts 1 false coin into a...   AM and GM of two numbers:    • Given the arithmetic mean and geometric me...   Speed of Pasig river:    • Speed of water in Pasig river - BARC Finals   Fly crushed between trains:    • Botfly crushed between two trains in colli...   BACKGROUND MUSIC Fluidscape by Kevin MacLeod is licensed under a Creative Commons Attribution 4.0 license. https://creativecommons.org/licenses/... Source: http://incompetech.com/music/royalty-... Artist: http://incompetech.com/