Question

12workers take4hours to completeal a job. how long would it take 15workers to complete the job​

Answer 1

Answer:

12. 4

15. x

where x is answer

using indirect proportionality

15/12=4/x

5/4=4/x

4/5=x/4

16/5 hrs

3.1 hrs

Answer 2

Here

workers and time are in indirect proportion.

x1y1=x2y2

here

x1=12

y1=4

x2=15

y2=x

12×4=15×x

x=12×4/15

=3.2hours

time taken by 15 workers to complete work is 3.2hours.

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