exercise: inversely proportional word problem 5
The supply of hay of a farmer lasts for 150 days to feed his 40 cows.
How long can he feed 30 cows with the same supply of hay?
answer: inversely proportional word problem 5
1. step: proportion
* 40 cows – 150 days
: 30 cows – x days
2. step: which proportion?
↓ less cows ↑ more days = inverse proportion
3. step: formula
x = 150 * 40
30
x = 200 days
4. step: answer
He can feed the 30 cows for 200 days.