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In 5 years, A will be 3 times as old as B. If B is currently 10 years old, how o

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Question: In 5 years, A will be 3 times as old as B. If B is currently 10 years old, how old is A now?

Options:

  1. 15
  2. 20
  3. 25
  4. 30

Correct Answer: 20

Solution: 

In 5 years, B will be 15. Therefore, A will be 3 * 15 = 45. So, A is currently 45 - 5 = 40 years old.

In 5 years, A will be 3 times as old as B. If B is currently 10 years old, how o

Practice Questions

Q1
In 5 years, A will be 3 times as old as B. If B is currently 10 years old, how old is A now?
  1. 15
  2. 20
  3. 25
  4. 30

Questions & Step-by-Step Solutions

In 5 years, A will be 3 times as old as B. If B is currently 10 years old, how old is A now?
Correct Answer: 40
  • Step 1: Identify B's current age, which is 10 years old.
  • Step 2: Calculate B's age in 5 years: 10 + 5 = 15 years old.
  • Step 3: According to the question, in 5 years, A will be 3 times as old as B. So, calculate A's age in 5 years: 3 * 15 = 45 years old.
  • Step 4: To find A's current age, subtract 5 years from A's age in 5 years: 45 - 5 = 40 years old.
  • Age Relationships – Understanding how to relate the ages of two individuals over time.
  • Algebraic Manipulation – Using basic algebra to solve for unknown variables based on given conditions.
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