Answer:
45 workers
Step-by-step explanation:
(15 workers * 90 hrs) / 1 wall = 1350 worker-hours per wall
1350 worker - hours / 30 hours = 45 workers
45 workers.
Step-by-step explanation
In 90 hours 15 workers will build one wall
So in 90 hours it w1ll take 1 worker to build 1/15 of a wall.
In 30 hours he would build 1/45 of a wall.
So to build the whole wall in 30 days it will take 45 workers.
32h^7
(4h^4)3=64h^12
64h^12/2h^5=
32h^12/2h^5=32h^7
Hope this helps :)
2, 3 and 7,8
hope this helps
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