Question

Initially the length of two tendrils $A$ and $B$ of a plant are $4cm$ and $8cm$ respectively. After one day they became $6cm$ and $10cm$ respectively. Which of the following statements about their growth rates should be true?

• A. Absolute growth rate of B is less than that of A
• B. Relative growth rates of both A and B are same
• C. Absolute growth rate of A is less than that of B
• D. Relative growth rate of A is more than that of B

Answer 1

Answer: (D)

Absolute growth rate in tendril $A=6-4$
$=2cm/day$
Absolute growth rate in tendril $B=10-8$
$=2cm/day$
Relative growth rate in tendril $A=\frac{2}{4}\times 100=50\%$
Relative growth rate in tendril $B=\frac{2}{8}\times 100=25\%$