Question 1076807
Now, 320 acres yields 320*4, or 1280 tons.
1280-640=640
640/400=1.6 tons per acre.
Today: 320 acres=1280 tons
Before:320 acres=512 tons
Before the new technology,320 acres yielded only 512 tons; whereas now, 320 acres yields 1280 tons. &#9786;&#9786;&#9786;&#9786;