Question

A primary root grows from 5 cm to 19 cm in a week. Calculate the growth rate and relative growth rate over the period.

Answer 1

Growth rate

L_t = L₀ + rt

⇒ 19 – 5 = r × l

14 cm per week

Relative growth rate = `"Change"/"Initial" xx 100`

= `(19 - 5)/5 xx 100`

= `14/5 xx 100`

= 280%