4 mat-weaves can weaves 4 mats in 4 days.At the same rate,how many mats would be woven by 8 mat-weaves in 8 days ?  Choices:
A) 4 B) 8 C) 12 D) 16 E) 17
Solution   Let the required number of mats be x.   More weaves,More mats (Direct Proportion)   More days,More mats (Direct Proportion)   ∴ 4 × 4 × x = 8 × 8 × 4 ⇔ x = (8x8x4)/(4x4)= 16. Answer 16
<result>D</result>
4 mat-weaves can weaves 4 mats in 4 days.At the same rate,how many mats would be woven by 8 mat-weaves in 8 days ?