A seedling grows 30 cm in 4 days under ideal conditions. Assuming the growth is linear, what is its average daily growth in centimetres and what will be its height after 8 days from planting?

Step-by-step solution

1. The growth is linear, so average growth = total height ÷ number of days.
2. $\frac{30\text{cm}}{4\text{days}}=7.5\text{cm/day}$
3. The height after 8 days = average growth × 8.
4. $7.5\text{cm/day}\times 8\text{days}=60\text{cm}$

Concept tested: Linear plant growth calculation

Published 13 October 2026 · How this solution was prepared and checked