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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.
Solution
Growth rate
Lt = 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%
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