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?
4
8
12
16
Explanation:
Let the required number of bottles be $ x $.
More weavers, More mats (Direct Proportion)
More days, More mats (Direct Proportion)
$\therefore$ 4 x 4 x $ x $ = 8 x 8 x 4
| $\Rightarrow x $ =$ \dfrac{(8 \times 8 \times 4)}{(4 \times 4)} $ |
$\Rightarrow x $ = 16.