Question

15 workers take 4 hours to build a wall then 12 workers need __________hours to build the wall​

Answer 1

Answer:

5 hours

Step-by-step explanation:

(15workers * 4 hours)/ 12 workers

Answer 2

Answer:

5 hours

Step-by-step explanation:

15 workers------- 4 hours

1 worker-------- 15×4 hours= 60

12 workers -------- 60/12 = 5 hours