Question

21 workers can build a wall in 45 hours how many workers will be required to do the same work in 15 hours

Answer 1

Step-by-step explanation:

21*45=15*x

x=21*45/15=63 days

Answer 2

Answer:

Number of Workers needed to do the same work in 15 hours = 63

Step-by-step explanation:

21 workers can build a wall in 45 hours

Total Work = Total Time ×  Number of Workers

⇒ 45 × 21 = 945

Now, Time = 15 hours

Number of Workers = Total Work / Time = 945 / 15 = 63