Question

If a leaf is 50 \(\text{cm}^{2}\) in size and the growth rate per day is 5 \(\text{cm}^{2}\) , then its relative growth rate would become ------------.

• A. 50 %
• B. 100 %
• C. 20 %
• D. 10 %

Hint:

Relative growth rate is the growth per unit time divided by the initial size, expressed as a percentage.

Answer 1

The Correct Option is D

Step 1: Understanding the Concept
Relative growth rate (RGR) = growth per unit time divided by the initial size, multiplied by 100.

Step 2: Calculation
Initial size = \(50\ \text{cm}^{2}\) and growth per day = \(5\ \text{cm}^{2}\).
\(\text{RGR} = \dfrac{5}{50} \times 100 = 10\%\)

Step 3: Conclusion
The relative growth rate of the leaf is 10 % per day.

Final Answer:
The relative growth rate is 10 %. \[ \boxed{\text{(D) }10\%} \]