Time, Speed, Distance Tricks - Example 1 (GMAT/GRE/CAT/Bank PO/SSC CGL) | Don't Memorise

TL;DR

Zara takes 20 minutes more to cover 20% more distance, finding original time taken.

Transcript

here's our first example it takes Zara 20 minutes more to cover 20 percent more distance this means that if Zara travels at her speed for 20 more minutes she would have covered 20 percent more than the original distance we need to find the time taken by Zara to travel the original distance now this is not a straightforward TST problem where we are ... Read More

Key Insights

• 🐎 Zara's problem involves covering two different distances at a constant speed.
• 🐎 Equating speeds and utilizing variation are essential techniques for solving time, speed, and distance problems efficiently.
• ⌛ Understanding the concept of variation helps relate time and distance changes in such problems.
• ❓ Comfort and understanding with the chosen problem-solving technique are crucial for mathematical success.
• 🐎 Using the speed multiplied by time equals distance formula simplifies solving complex time, speed, and distance problems like Zara's.
• 🥺 Smart usage of variation principles can lead to a quick and accurate solution to time, speed, and distance problems.
• ❓ Different problem-solving techniques may yield different solutions, highlighting the importance of choosing a method one is comfortable with.

Questions & Answers

Q: How does Zara's time, speed, and distance problem differ from a standard TST problem?

Zara's problem involves two parts where she covers different distances at a constant speed, requiring the use of variation and equating speeds for solution.

Q: How can Zara's problem be solved using the speed multiplied by time equals distance formula?

By setting up equations for Zara's speed, time, and distance in each case and equating speeds, the original time taken can be determined using the formula.

Q: Why is it essential to understand the concept of variation when solving Zara's time, speed, and distance problem?

Variation helps relate the differences in time and distance for Zara's problem, enabling the calculation of the original time taken to travel the distance.

Q: Why is it crucial to choose a problem-solving technique that one is comfortable with in mathematics?

Understanding and comfort with the chosen technique are vital for accurately and efficiently solving math problems like Zara's, ensuring a clear understanding of the solution process.

Summary & Key Takeaways

• Zara needs 20 extra minutes to cover 20% more distance at a constant speed.

• Using speed multiplied by time equals distance formula to solve the problem.

• Equating speeds in both cases and utilizing the concept of variation to find the original time taken by Zara.