China Naming Network - Fortune telling knowledge - As the weather gradually gets colder, the grass on the pasture not only stops growing, but actually decreases at a fixed rate.

It is known that the grass on a certain field can be eaten by 20 cows for 5 days.

As the weather gradually gets colder, the grass on the pasture not only stops growing, but actually decreases at a fixed rate.
It is known that the grass on a certain field can be eaten by 20 cows for 5 days.

The number of days that the reduced grass can feed one cow every day: 20*5-15*6=10

The number of days that the original grass can feed one cow: 20 *5+5*10=150=15*6+6*10

The number of days that one cow can eat with the reduced grass in 3 days: 3*10=30

3 The number of cows that can be grazed in one day: (150-30)/3=40

So 40 cows can be fed for 3 days

Suppose the grass that each cow eats every day is x , the amount of grass lost in the pasture every day is y, then based on the grass available in the original pasture

20*5x+5y=15*6x+6y, y=10x, then the original grass is 150x

So (150x-3y)/(3x) = 40 cows can be eaten for 3 days

上篇: Is the couple's right to fight in the palace transformed into the zodiac? 下篇: See if my horoscope is rich or weak, and how to resolve it.

As the weather gradually gets colder, the grass on the pasture not only stops growing, but actually decreases at a fixed rate.It is known that the grass on a certain field can be eaten by 20 cows for 5 days.

As the weather gradually gets colder, the grass on the pasture not only stops growing, but actually decreases at a fixed rate.
It is known that the grass on a certain field can be eaten by 20 cows for 5 days.