# In a dairy farm, 40 cows eat 40 bags of husk in 40 days. In how many days one cow will eat one bag of husk ?

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

A. 1

B. 1/40

C. 40

D. 80

**Answer : **C. 40

## Explanation:

Assume that in x days, one cow will eat one bag of husk.

More cows, less days (Indirect proportion)

More bags, more days (Direct proportion)

Hence we can write as

x = 40.