The Easiest Method in Solving Time-Rate Problems in Differential Calculus

Hi, I'm Armand Gelig Macapagong, an engineer by profession and a mathematician by heart. I'm a Math quizzer since my elementary days up until I graduated college. I won numerous Math titles and contests during my time as a quizzer.
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Here are some of the awards and achievements I've had during my time as a Math quizzer, in a team and solo.
• MTAP-TL CASIO MATH QUIZ for Teachers, 1st Runner-up (2014)
• CESAFI MATH QUIZ, Champion (2013)
• MATHEMATICIAN OF THE YEAR (UC), Champion (2013)
• PICE REGIONAL QUIZ, 2nd Runner-up (2012)
• CESAFI MATH QUIZ, Champion (2012)
• MTAP-TL CASIO MATHalino Challenge, 1st Runner-up (2012)
• MTAP-TL REGIONAL MATH COUNT, Champion (2011)
• CESAFI MATH QUIZ, 1st Runner-up (2009)
• MATHEMATICIAN OF THE YEAR (CIT), Champion (2006)
• UP MATH CIRCLE QUIZ, 1st Runner-up (2006)
• UP MATH CIRCLE QUIZ, Champion (2005)
• SANGKA SA KAALAM (History), Champion (2002)
• Board Passer – Civil Engineering Licensure Examinations (Rating, 91.50%, 95% on Mathematics)
• Board Passer – Master Plumber Licensure Examinations (91% on Mathematics w/o Review)
• Dean’s Lister/ Top Student (College)
• Consistent 1st Honor (Highschool)
• Consistent Top Student (Elementary)
• Doña Modesta Gaisano Excellence Award (2006), Valedictorian
• Don Sergio Osmeña Youth Excellence Award (2006), Valedictorian
• Don Sergio Osmeña Youth Excellence Award (2002), Valedictorian
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I would like to share all the quick ways and speed Maths I've accumulated along those years participating in Math events. I've known lots of tricks and techniques that might help aspiring mathematicians, math lovers and even just ordinary students. Even for professionals, learning never ends. I also plan on creating content relating Maths to everyday life. See? Who says Math isn't useful, just stay tuned!
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Since my channel is still new, help me by subscribing to my channel and share this channel to your friends too.
Here's the link below:
   / @mathematicstutorialsbyengrmaca  

For you who haven't watched any of my videos yet, here are the links below.
ALSO, please bear with how I did all my initial videos since they were just sort of test videos and I am aiming to improve the quality and presentation for each video I upload. Nonetheless, please know I'm trying my best to serve you all.

The easiest way to Integrate by Parts:
   • Integration by Parts - The easiest way?!  

Solving Quadratic Equations using an easy method:
   • Solving Quadratic Equations --- the easy w...  

Quick Mental Maths Part 1 (Basic Maths):
   • Quick Mental Math Part 1  

Facebook Page:
  / mathtricks2020  

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Thank you for the continued support and if you have something to suggest, please comment your thoughts and we'll hear it through..