If a school generates $200$ kg of waste annually and composting reduces landfill usage by $30$, how many trees can be saved, given that each tree saves $10$ kg of waste per year?

Step-by-step solution

1. Calculate diverted waste: $0.30\times 200=60$ kg.
2. Divide by waste saved per tree: $60div10=6$ trees.
3. Thus, 6 trees are saved.

Concept tested: Compost diversion

Published 4 October 2026 · How this solution was prepared and checked