15. 4 mat-weavers can weave 4 mats in 4 days. At the same rate how many mats would be woven by 8 mat-wea

A.4

B.8

C.12

D.16

16. Running at the same constant rate 6 identical machines can produce a total of 270 bottles per minute

A.648

B.1800

C.200

D.1080

17. In a dairy farm 40 cows eat 40 bags. of husk in 40 days. In how many days one cow will eat one bag o

A.1

B.Jan-40

C.40

D.80

18. 12 men working 8 hours per day complete a piece of work in 10 days. To complete the same work in 8 d

A.4

B.5

C.6

D.8

19. 10 men working 6 hours a day can complete a work in 18 days. How many hours a day must 15 men work t

A.6

B.10

C.12

D.15

20. 39 persons can repair a road in 12 days working 5 hours a day: In how many days will 30 persons work

A.10

B.13

C.14

D.15

21. 3 pumps working 8 hours a day can empty a tank in 2 days. How many hours a day must 4 pumps work to

A.9

B.10

C.11

D.12

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