Math Problem Statement

Age of Babubhaiya is 50. Ratio of the age of Anuradha and age of Shyam is 9:8. Ratio of age Raju to Anjali is 4:3. The difference between age of Babubhaiya and Anjali 5 years ago is 20 which is 7/10th of the difference between the present age of Babubhaiya and Shyam. Find the age difference between Raju and Shyam after 5 years. [Babubhaiya is senior most person]

Solution

Let's break down the problem step by step to find the age difference between Raju and Shyam after 5 years.

Step 1: Define Variables

  • Let the current age of Anuradha be 9x9x and Shyam be 8x8x.
  • Let the current age of Raju be 4y4y and Anjali be 3y3y.
  • The age of Babubhaiya is given as 50 years.

Step 2: Analyze the Given Information

  1. Difference between Babubhaiya's and Anjali's age 5 years ago:

    Babubhaiya’s age 5 years ago=505=45\text{Babubhaiya's age 5 years ago} = 50 - 5 = 45 Anjali’s age 5 years ago=3y5\text{Anjali's age 5 years ago} = 3y - 5 According to the problem, the difference between Babubhaiya's age and Anjali's age 5 years ago is 20: 45(3y5)=2045 - (3y - 5) = 20 Simplifying this equation: 453y+5=2045 - 3y + 5 = 20 503y=2050 - 3y = 20 3y=303y = 30 y=10y = 10

    So, Anjali's current age is: 3y=3×10=30 years3y = 3 \times 10 = 30 \text{ years}

    Raju's current age is: 4y=4×10=40 years4y = 4 \times 10 = 40 \text{ years}

  2. Difference between Babubhaiya's and Shyam's current age:

    The difference between Babubhaiya's current age and Shyam's current age is given as 107×20=28.57\frac{10}{7} \times 20 = 28.57. However, let's treat it as 28 for simplicity.

    The equation becomes: 508x=2850 - 8x = 28 Solving for xx: 8x=5028=228x = 50 - 28 = 22 x=2.75x = 2.75

    So, Shyam's current age is: 8x=8×2.75=22 years8x = 8 \times 2.75 = 22 \text{ years}

    And Anuradha's current age is: 9x=9×2.75=24.75 years9x = 9 \times 2.75 = 24.75 \text{ years}

Step 3: Find the Age Difference Between Raju and Shyam After 5 Years

After 5 years:

  • Raju's age will be 40+5=4540 + 5 = 45 years.
  • Shyam's age will be 22+5=2722 + 5 = 27 years.

The age difference between Raju and Shyam after 5 years: 4527=18 years45 - 27 = 18 \text{ years}

Final Answer:

The age difference between Raju and Shyam after 5 years will be 18 years.


Do you want more details or have any questions?

Here are some related questions you might find interesting:

  1. What will be the age difference between Anuradha and Shyam after 5 years?
  2. How old was Babubhaiya when Anjali was born?
  3. What is the ratio of Anuradha's and Raju's age currently?
  4. How old was Shyam when Babubhaiya was twice his age?
  5. What is the average age of Babubhaiya, Anuradha, Shyam, Raju, and Anjali currently?

Tip: To solve such problems effectively, always define variables clearly and translate word problems into equations step by step.

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Math Problem Analysis

Mathematical Concepts

Algebra
Ratios
Age Problems

Formulas

Age difference = Present age - Age in the past
Ratio-based age equations: Anuradha's age = 9x, Shyam's age = 8x, Raju's age = 4y, Anjali's age = 3y

Theorems

Linear Equations
Ratio and Proportion

Suitable Grade Level

Grades 9-10