Final answer:
Ato Alemu should be paid 28,500 birr for a job that requires 60 hours of work.
Step-by-step explanation:
To find out how much Ato Alemu should be paid for a job that requires 60 hours of work, we can use the concept of proportionality. If Ato Alemu was paid 19,000 birr for a job that required 40 hours of work, we can set up a proportion:
(19,000 birr) / (40 hours) = (x birr) / (60 hours)
Cross multiplying, we get:
40x = 19,000 * 60
Dividing both sides by 40, we find that x = 28,500 birr. Therefore, Ato Alemu should be paid 28,500 birr for a job that requires 60 hours of work.