Math Problem Statement

Sharat is walking down a descending escalator and takes 40 steps to reach the bottom. Chandra starts simultaneously from the bottom, taking two steps for every one step taken by Sharat. Time taken by Sharat to reach the bottom from the top is the same as the time taken by Chandra to reach the top from the bottom. How many steps more than Sharat did Chandra take before they crossed each other on the escalator?

Solution

To solve this problem, let’s go through the information provided step-by-step:

  1. Sharat's Movement: Sharat is walking down a descending escalator and takes 40 steps to reach the bottom.

  2. Chandra's Movement: Chandra starts from the bottom and takes two steps for every one step taken by Sharat.

  3. Equal Time: The time taken by Sharat to reach the bottom from the top is the same as the time taken by Chandra to reach the top from the bottom.

  4. Objective: We need to find how many steps more than Sharat Chandra takes before they cross each other on the escalator.

Solution

Let’s assume:

  • tt = time taken by Sharat to reach the bottom.
  • SsS_s = step speed of Sharat in steps per unit time, where Ss×t=40S_s \times t = 40.
  • Since Chandra takes two steps for every step Sharat takes, his step speed Sc=2SsS_c = 2S_s.

Since they start simultaneously and meet at the same time, the relative motion between them allows us to set up equations based on their speeds and the distance covered by each. However, to solve this fully, we need some assumption or simplification to move forward (like exact speeds or escalator speed if implied).

Would you like a detailed setup of equations for a complete solution?


Related Questions

  1. If the escalator's speed was given, how would it affect the result?
  2. What if Sharat took only half the steps compared to Chandra's two steps at the same time?
  3. How can we determine the speed of an escalator if the times were provided?
  4. Is there a way to solve this problem using relative speed concepts directly?
  5. Could the direction of movement (up or down) for each person impact the total steps covered?

Tip

When solving relative motion problems, setting up variables carefully helps in constructing equations that simplify the analysis.

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Math Problem Analysis

Mathematical Concepts

Relative Speed
Algebra

Formulas

Relative Speed formula
Step calculation based on speed ratio

Theorems

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Suitable Grade Level

Grades 8-10