Ramu is a $20$-year-old worker who weighs $40\text{ kg}$ and has a height of $1.60\text{ m}$. Calculate his Body Mass Index (BMI) using the formula $\text{BMI}=\frac{\text{Weight in kg}}{(\text{Height in m}{)}^2}$, and state whether he is undernourished, normal, or overweight.

Step-by-step solution

1. Step 1: Identify the given values: $\text{Weight}=40\text{ kg}$ and $\text{Height}=1.60\text{ m}$.
2. Step 2: Calculate the square of the height in metres: $(1.60{)}^2=2.56{\text{ m}}^2$.
3. Step 3: Divide the weight by the height squared to get the BMI: $\text{BMI}=\frac{40}{2.56}=15.625{\text{ kg/m}}^2$.
4. Step 4: Compare the calculated BMI with standard health thresholds: A BMI below $18.5{\text{ kg/m}}^2$ indicates undernourishment, between $18.5$ and $24.9{\text{ kg/m}}^2$ is normal, and $25{\text{ kg/m}}^2$ or above is overweight.
5. Step 5: Conclude that since $15.625<18.5$, Ramu is undernourished.

Concept tested: Body Mass Index calculation and health classification

Published 31 August 2026 · How this solution was prepared and checked

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