Correct Answer - Option 1 : 5 hours 57 minutes
Given
B can cut 112 trees in 30 minutes
A is 125% as efficient as B
Formula Used
Work = Time × Efficiency
Calculation
A can cut trees in 30 minutes
⇒ 125% of 112 = 140 trees
⇒ In 30 minutes, the number of trees cut by A and B together
⇒ 112 + 140 = 252 trees
In 1 hour, they together can cut
⇒ 252 × 2 = 504 trees
The number of hours taken by them to cut 3000 trees
⇒ 3000/504
⇒ 5 hours 57 minutes
∴ Time taken to complete the work is 5 hours 57 minutes.