Question
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ether? he sum of the ages of Mr. Daniel and his laughter is 60 years. 5 years ago, the ratio of heir ages was \( 1: 4 \). a) How old are they now?

Ask by Hodgson Whittaker. in Nigeria
Jan 23,2025

Real Tutor Solution

Tutor-Verified Answer

Answer

Mr. Daniel is 45 years old, and his child is 15 years old.

Solution

It appears there might have been a slight typo in your question. Assuming you meant: **"The sum of the ages of Mr. Daniel and his [child] is 60 years. Five years ago, the ratio of their ages was \(1:4\).** Let's solve for their current ages. ### Let’s Define the Variables: - Let \( x \) be Mr. Daniel's current age. - Let \( y \) be his child's current age. ### Given: 1. **Sum of their current ages:** \[ x + y = 60 \quad \text{(Equation 1)} \] 2. **Five years ago, the ratio of their ages was \(1:4\):** \[ \frac{x - 5}{y - 5} = \frac{1}{4} \quad \text{(Equation 2)} \] ### Solving the Equations: **From Equation 2:** \[ 4(x - 5) = y - 5 \] \[ 4x - 20 = y - 5 \] \[ 4x - y = 15 \quad \text{(Equation 3)} \] **Now, substitute Equation 1 into Equation 3:** \[ 4x - (60 - x) = 15 \] \[ 4x - 60 + x = 15 \] \[ 5x - 60 = 15 \] \[ 5x = 75 \] \[ x = 15 \] **This would imply:** \[ y = 60 - 15 = 45 \] **However, this result suggests that Mr. Daniel is 15 years old and his child is 45, which isn't logical.** **Re-evaluating the Ratio:** It's more plausible that **Mr. Daniel is the older individual**. Therefore, the correct interpretation of the ratio should be: \[ \frac{y - 5}{x - 5} = \frac{1}{4} \] \[ y - 5 = \frac{1}{4}(x - 5) \] \[ 4(y - 5) = x - 5 \] \[ 4y - 20 = x - 5 \] \[ 4y - x = 15 \quad \text{(Equation 4)} \] **Substituting Equation 1 into Equation 4:** \[ 4y - (60 - y) = 15 \] \[ 4y - 60 + y = 15 \] \[ 5y = 75 \] \[ y = 15 \] \[ x = 60 - 15 = 45 \] ### **Solution:** - **Mr. Daniel's Current Age:** 45 years - **His Child's Current Age:** 15 years ### **Verification:** - **Five years ago:** - Mr. Daniel was \(45 - 5 = 40\) years old. - His child was \(15 - 5 = 10\) years old. - **Ratio of their ages five years ago:** \(40:10 = 4:1\), which aligns with the given ratio when interpreted correctly. **Therefore, Mr. Daniel is currently 45 years old, and his child is 15 years old.**

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The Deep Dive

Let's denote Mr. Daniel's age as \( D \) and his daughter's age as \( d \). According to the information given, we have two equations: 1. \( D + d = 60 \) 2. Five years ago, the ratio of their ages was \( 1:4 \), which translates to \( \frac{D - 5}{d - 5} = \frac{1}{4} \). From the second equation, we can express it as: \[ 4(D - 5) = d - 5 \] Expanding this gives us: \[ 4D - 20 = d - 5 \] Rearranging results in: \[ d = 4D - 15 \] Now, we can substitute this expression for \( d \) into the first equation: \[ D + (4D - 15) = 60 \] Simplifying yields: \[ 5D - 15 = 60 \] Adding 15 to both sides, we get: \[ 5D = 75 \] Dividing by 5 gives: \[ D = 15 \] Now, substituting \( D \) back into the first equation to find \( d \): \[ 15 + d = 60 \] This simplifies to: \[ d = 45 \] Thus, Mr. Daniel is 15 years old, and his daughter is 45 years old now.

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