Question

A Leaf of $20c{m}^2$ grows $5c{m}^2$ per hour and B Leaf of $25c{m}^2$ grows $5c{m}^2$ per hour The relative growth rate of leaf A and B respectively is

• A. 25% and 20%
• B. 20% and 25%
• C. 50% and 100%
• D. 25% and 50%

Answer 1

The correct option is A 25% and 20%

Relative growth is the increase in size relative to the size of the plant leaf present at the start of a given time interval. It can be also expressed as percentage increase.

Relative Growth Rate =
$\frac{ChangeinParameter}{TimexInitialParameter}X100$

Hence, for leaf A, relative growth = $\frac{5}{20}X100=25\%$ .
For leaf B, relative growth =
$\frac{5}{25}X100=20\%.$

So, the correct answer is 25% and 20%.