A boy is 15 year old and 150 cm tall. At the end of the growth period, he is likely to be (Note : Percentage of full height of 15 years old boy is 95%)

Options

A. 160 cm tall
B. 140 cm tall
C. 158 cm tall
D. 168 cm tall.

Explanation

To determine the likely height of a 15-year-old boy at the end of his growth period, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Current Height and Percentage**:
- The current height of the boy is 150 cm.
- At 15 years old, he has reached 95% of his full height.

2. **Set Up the Equation**:
- We need to find the full height (100%) based on the current height (150 cm) and the percentage (95%).
- The formula to find the full height is:
\[ \text{Full Height} = \frac{\text{Current Height}}{\text{Percentage of Full Height}} \times 100 \]

3. **Plug in the Values**:
- Current Height = 150 cm
- Percentage of Full Height = 95
- Thus, the equation becomes:
\[ \text{Full Height} = \frac{150 \text{ cm}}{95} \times 100 \]

4. **Calculate the Full Height**:
- First, divide 150 by 95:
\[ \frac{150}{95} \approx 1.5789 \]
- Now multiply by 100:
\[ 1.5789 \times 100 \approx 157.89 \text{ cm} \]
- Rounding this value gives us approximately 158 cm.

5. **Conclusion**:
- Therefore, at the end of the growth period, the boy is likely to be around 158 cm tall.

### Final Answer:
The boy is likely to be **158 cm tall** at the end of his growth period.

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