Question

7 workers working 6 hours a day can build a wall in 12 days. How many days will 3 workers take to build a similar wall, working 8 hours a day? ​

Answer 1

Ok i would use the concept of ’mandays'
So basically, (no. of workers) x (no. of hours) is constant
=> 7 x (6x12) = 3 x (8xD)
=> D = 21
so they will take 21 days

Answer 2

Answer:21 Days

Step-by-step explanation:7*6=42*12=504 days                                                                               3 workers So,3*8=24hrs then 504/24=21 days