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Question

Michael lives 10 km away from where I live. Ahmed lives 5 km away and Susan lives 7 km away from where I live. Arun is farther away than Ahmed but closer than Susan from where I live. From the information provided here, what is one possible distance (in km) at which I live from Arun’s place?

The correct answer is

6.02

Understanding the Distances

The problem provides specific distances for Michael, Ahmed, and Susan from my place of residence. We need to determine a possible distance for Arun based on the given relative information.

Person Distance from My Place (in km)
Michael 10
Ahmed 5
Susan 7

Arun's Distance Conditions

The problem states two conditions for Arun's distance from my place:

  • Arun is farther away than Ahmed.
  • Arun is closer than Susan.

Let D_{Arun} represent the distance of Arun's place from my place.

From the first condition, "Arun is farther away than Ahmed", we know that Arun's distance must be strictly greater than Ahmed's distance. Ahmed lives 5 km away from my place. Therefore, we can write the first inequality as:

$$ D_{Arun} \gt 5 \text{ km} $$

From the second condition, "Arun is closer than Susan", we know that Arun's distance must be strictly less than Susan's distance. Susan lives 7 km away from my place. Therefore, we can write the second inequality as:

$$ D_{Arun} \lt 7 \text{ km} $$

Combining Arun's Distance Inequalities

By combining both of these conditions, we can establish a specific range within which Arun's distance must fall. Arun's distance must be greater than 5 km and less than 7 km simultaneously. This combined condition can be written as a single inequality:

$$ 5 \text{ km} \lt D_{Arun} \lt 7 \text{ km} $$

This means that any valid distance for Arun must be a value strictly between 5 km and 7 km.

Evaluating the Possible Distances

Now, let's examine the given options to see which one satisfies the condition that the distance must be greater than 5 km and less than 7 km.

Option Distance (km) Satisfies 5 \text{ km} \lt D_{Arun} \lt 7 \text{ km}?
1 3.00 No ($3.00 \text{ km} \not\gt 5 \text{ km}$)
2 4.99 No ($4.99 \text{ km} \not\gt 5 \text{ km}$)
3 6.02 Yes ($5 \text{ km} \lt 6.02 \text{ km} \lt 7 \text{ km}$)
4 7.01 No ($7.01 \text{ km} \not\lt 7 \text{ km}$)

Concluding the Possible Distance for Arun

From the analysis of the options, only 6.02 km falls within the required range of (5 km, 7 km). Therefore, 6.02 km is a possible distance at which I live from Arun's place.

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Important Questions from Numerical Estimation

  1. The number of digits you have to type to write all the page numbers of a book starting from I (first page) is 2019. What is the number of pages in that book?

  2. 1200 men and 500 women can build a bridge in 2 weeks. 900 men and 250 women will take 3 weeks to build the same bridge. How many men will be needed to build the bridge in one week?

  3. The number of 3-digit numbers such that the digit 1 is never to the immediate right of 2 is

  4. Given \({\left( {9{\rm{\;inches}}} \right)^{\frac{1}{2}}} = {\left( {0.25{\rm{\;yards}}} \right)^{\frac{1}{2}}}\). Which one of the following statements is TRUE?

  5. Two and a quarter hours back, when seen in a mirror, the reflection of a wall clock without number markings seemed to show 1:30. What is the actual current time shown by the clock?

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