If 500 kgs of grass will feed 20 cowd for a week,for how many days will 200 kgs of grass feed 14 cows

Question

500 kgs of grass will feed 20 cowd for a week,for how many days will 200 kgs of grass feed 14 cows

Answer 1

500 kg feeds 20 cows for 7 days, so 500 kg feeds 1 cow for 7(20) days = 140 days

 

Do a proportions analysis:

 

500 kg feeds 1 for 140 days.

200 kg feeds 1 for x days.

 

500 → 140

200 → x

 

x = (200 * 140) / 500 = 56

 

So 200 kg feeds 1 cow for 56 days.  But if you have 14 cows to feed, the supply will last 56/14 days = 4 days.