Respuesta :
Let's simplify the people down to 5, (divide by 3) and lets multiply the time by 3, now it's 5 people in 21 hours, next, we multiply the people by 7 to get 35, and we divide the time by 7 (21 ÷ 7 = 3), It takes 3 hours for 35 workers to finish.
[tex]7 \div \dfrac{35}{15} \\ = 7 \times \dfrac{15}{35} \\ = 3[/tex]
Answer : It would take 3 hours.
Hope this helps. - M
Answer : It would take 3 hours.
Hope this helps. - M