A 50 km² forest area has a pine tree density of 150 trees per hectare. How many pine trees are there in total?

Step-by-step solution

1. Convert the area from square kilometres to hectares: $1{\text{ km}}^2=100\text{ hectares}$, so $50{\text{ km}}^2=50\times 100=5000\text{ hectares}$.
2. Multiply the number of hectares by the tree density: $5000\text{ ha}\times 150\text{ trees/ha}=750,000\text{ trees}$.
3. Thus there are 750,000 pine trees in the forest area.

Concept tested: Tree density calculations

Published 1 October 2026 · How this solution was prepared and checked