Question:
If 48 Lbs/year $CO_2$ was absorbed by a single tree and $O_2$ released by it supports 2 human beings, How many minimum number of trees require per acre to support 120 human beings, if an acre trees can support oxygen for 18 people per year.
If 48 Lbs/year $CO_2$ was absorbed by a single tree and $O_2$ released by it supports 2 human beings, How many minimum number of trees require per acre to support 120 human beings, if an acre trees can support oxygen for 18 people per year.
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The extra information about "per acre" is secondary to the primary ratio of human support.
Updated On: Jun 10, 2026
- 15 trees
- 60 trees
- 45 trees
- 100 trees
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Verified By Collegedunia
The Correct Option is B
Solution and Explanation
Step 1: Concept
Basic proportionality in environmental support systems.
Step 2: Meaning
Calculating the trees required per human based on the provided support ratios.
Step 3: Analysis
If 1 tree supports 2 humans, then to support 120 humans, we need: $120 / 2 = 60$ trees.
Step 4: Conclusion
The calculation yields 60 trees.
Final Answer: (B)
Basic proportionality in environmental support systems.
Step 2: Meaning
Calculating the trees required per human based on the provided support ratios.
Step 3: Analysis
If 1 tree supports 2 humans, then to support 120 humans, we need: $120 / 2 = 60$ trees.
Step 4: Conclusion
The calculation yields 60 trees.
Final Answer: (B)
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