Question

fifteen workers take 4 hrs to build a wall , How many hrs will 12 workers need to build same wall​

Answer 1

Step-by-step explanation:

15 workers take 4 hrs to build a wall

time needed to 15 workers to build= 4 hrs

a wall

time needed to 1 worker to complete= 15×4 hrs

the same wall

time needed by 12 workers to = 15×4÷12 hrs

complete the same wall = 5hrs

Therefore 12 workers can build the wall in 5hrs. (answer)