Chain Rule Q66

66. 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?

[A] 4

[C] 12

[B] 8

[D] 16

Answer : D

Explanation :

Let the required number of mats be x.

More weavers, More mats (Direct Proportion)

More weavers, More mats (Direct Proportion)

Weavers 4 : 8 Days 4 : 8  :: 4 : x

4 x 4 x x = 8 x 8 x 4

x = (8 x 8 x 4) (4 x 4)

x = 16