Question

Rahul can plant 20 trees in 4 days, if he is asked to plant 90 trees, how many days will he take?

• A. 20 days
• B. 18 days
• C. 19 days
• D. 21 days

Answer 1

The correct option is B 18 days

Number of days Rahul takes to plant 20 trees $=4$ days
Number of days Rahul takes to plant 1 tree $=\frac{4}{20}$ days
So, number of days rahul will take to plant 90 trees $=\frac{4}{20}\times 90=18$ days