Question

If it takes 70 workers 3 hours to disassemble the exhibition rides at a small amusement park, how many hours would it take 30 workers to do this same job? 40 3 11 7 7 3 9 7

Answer 1

`70 \text{ workers} \longrightarrow 3 \text{ hours}`

Find 1 worker:


`1 \text{ worker} \longrightarrow 3 * 70 \text{ hours}`


`1 \text{ worker} \longrightarrow 210 \text{ hours}`

Find 30 workers:


`30 \text{ workers} \longrightarrow 210 / 30 \text{ hours}`


`30 \text{ workers} \longrightarrow 7 \text{ hours}`


Answer: It will take 7 hours for 30 workers to do this same job.