40 cows eat 40 bags of husk in 40 days.
? 1 cows eat 40 bags of husk in 40 x 40 days.
? 1 cows eat 1 bags of husk in 40 x 40 / 40 days.
? 1 cows eat 1 bags of husk in 40 days.

15 Cows eat as much as 21 Goats.
? 1 Cows eat as much as 21/ 15 Goats.
? 35 Cows eat as much as 21 x 35 / 15 Goats.
? 35 Cows eat as much as 21 x 7 / 3 Goats.
? 35 Cows eat as much as 7 x 7 Goats.
? 35 Cows eat as much as 49 Goats.

Since 39 persons can repair a road by working 5 hours in a day in 12 days.
? 1 persons can repair a road by working 5 hours in a day in 39 x 12 days.
? 1 persons can repair a road by working 1 hours in a day in 39 x 12 x 5 days.
? 30 persons can repair a road by working 1 hours in a day in 39 x 12 x 5 / 30 days.
? 30 persons can repair a road by working 6 hours in a day in 39 x 12 x 5 / 30 x 6 days.
? 30 persons can repair a road by working 6 hours in a day in 39 x 2 x 1 / 6 days.
? 30 persons can repair a road by working 6 hours in a day in 39 x 1 x 1 / 3 days.
? 30 persons can repair a road by working 6 hours in a day in 13 days.

4 mat-weavers in 4 days can weave 4 mats.
1 mat-weavers in 4 days can weave 4 / 4 mats.
1 mat-weavers in 1 days can weave 4 / 4 x 4 mats.
8 mat-weavers in 1 days can weave 4 x 8 / 4 x 4 mats.
8 mat-weavers in 8 days can weave 4 x 8 x 8 / 4 x 4 mats.
8 mat-weavers in 8 days can weave 4 x 2 x 2 mats.
8 mat-weavers in 8 days can weave 16 mats.

As we know that Quarter Kg = 250 Gram
According to question,
250 Gram of potato costs 60 paise.
? 1 Gram of potato costs 60 / 250 paise.
? 200 Gram of potato costs 60 x 200 / 250 paise.
? 200 Gram of potato costs 60 x 20 / 25 paise.
? 200 Gram of potato costs 60 x 4 / 5 paise.
? 200 Gram of potato costs 12 x 4 paise.
? 200 Gram of potato costs 48 paise.

According to question,
40 cows eat 40 bags of husk in 40 days.
1 cows eat 40 bags of husk in 40 x 40 days.
1 cows eat 1 bags of husk in 40 x 40 / 40 days.
1 cows eat 1 bags of husk in 40 days.

According to given question,
Since an industrial loom weaves 0.128 meters of cloth in 1 seconds.
? an industrial loom weaves 1 meters of cloth in 1 / 0.128 seconds.
? an industrial loom weaves 25 meters of cloth in 1 x 25 / 0.128 seconds.
? an industrial loom weaves 25 meters of cloth in 25 / 0.128 seconds.
? an industrial loom weaves 25 meters of cloth in 195 seconds.

Since 8 men in 24 days can reap 80 hectares.
? 1 men in 24 days can reap 80 / 8 hectares.
? 1 men in 1 days can reap 80 / 8 x 24 hectares.
? 36 men in 1 days can reap 80 x 36 / 8 x 24 hectares.
? 36 men in 30 days can reap 80 x 36 x 30 / 8 x 24 hectares.
? 36 men in 30 days can reap 10 x 36 x 30 / 24 hectares.
? 36 men in 30 days can reap 10 x 3 x 30 / 2 hectares.
? 36 men in 30 days can reap 10 x 3 x 15 hectares.
? 36 men in 30 days can reap 450 hectares.