Question

If 18 workers can build a wall in 15 days then 45 workers can build it in _____ days.

Answer 1

Answer:

37.5 days

Step-by-step explanation:

18 workers take 15 days

1 worker takes 15/18 or 5/6 days

45 workers take 45x 5/6

which is 37.5 days

Answer 2

Answer:

18 workers can build a wall in 15 days

18 workers -> 15 days

45 workers -> ?

Therefore,

18 x 15 = 45 x D

270 = 45 x D

$\frac{270}{45}$ = D

D = 6 days

45 workers can build it in 6 days.