Answer:
The project needs 18 workers to be done in 25 days.
Step-by-step explanation:
the project is 10 workers × 45 days = 450 "work" divided by the workers in days
this "450 work" needs to be done in 25 days so there's a need for 450/25 = 18 workers to do the work
thus, they need to add 8 more workers
10 workers × 45 days = x workers × 25 days
10 workers × 45 days ÷ 25 days = x workers
x workers = 18 workers
