Question

1 ) afforestation drive led to a 20% increase in the number of trees in the forest area over a year . During this period 10% of the trees wear cut down in different parts of the forest . If there were 20,000 trees in the forest , find the percentage of new trees in the forest now .​

Answer 1

Answer:

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Total number of trees in the forest = 20,000

Number of trees increased = 20% of 20,000

$= \frac{20}{100} \times 20000$

= 4,000

Number of trees cutted down = 10% of 20,000

$= \frac{10}{100} \times 20000 = 2000$

Total number of trees present trees = 20,000 + 4,000 - 2,000

= 24,000 - 2,000 = 22,000

Number of new trees = 2,200 - 22,000 = 2,000

Percentage of increased trees =

$= \frac{2000}{20000 } \times 100 = 10\%$

• Hence, the percentage of new trees will be 10% ans.