or
or
The rate for each worker can be expressed as 22/7 units per hour.
let, n = the number of workers needed to produce 90 units per hour, and we have:
so, n(22/3) = 90
or, 22n = 270
∴n = 270/22 = 12.2, so there must be at least 13 workers.
ans: 13 workers
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