4 mat-weavers can weave 4 mats in 4 days. At the same rate, how many mats would be woven by 8 mat-weavers in 8 days?

Let the required number of bottles be x.

More weavers, More mats (Direct Proportion)

More days, More mats (Direct Proportion)

$weavers 4:8\} :4:xdays 4:8\}:4:x$ 

4 x 4 x x = 8 x 8 x 4

=> x =  $\frac{8*8*4}{4*4}$

=> x = 16.