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.

Hence, for leaf A, relative growth = 5/20 × 100 = 25

For leaf B, relative growth = 5/25 × 100 = 20.

So, the correct option is '25 and 20'.