China Naming Network - Solar terms knowledge - Because of the cold weather, the grass on the pasture is not growing, but decreasing at a fixed rate.
Because of the cold weather, the grass on the pasture is not growing, but decreasing at a fixed rate.
(1) daily decrease of grass: (20×5-90)÷(6-5)= 10 (serving);
There was grass on the pasture before the cows ate grass.
10×5+20×5
=50+ 100,
= 150 (copies).
③ 150÷ 10- 10,
=5 (head).
Answer: You can feed 5 cows 10 day.