1. The purchase price of a batch of goods is a yuan. If the gross profit (what is it?) is to account for 30% of the bid price, the bid price should be a yuan? 2. The length of one right side of a right triangle is reduced by 25%. To keep its area unchanged, the other side should be increased () A. A quarter B. a quarter of it c. a third of it D. two fifths of it

1. The purchase price of a batch of goods is a yuan. If the gross profit (what is it?) is to account for 30% of the bid price, the bid price should be a yuan? 2. The length of one right side of a right triangle is reduced by 25%. To keep its area unchanged, the other side should be increased () A. A quarter B. a quarter of it c. a third of it D. two fifths of it

1. The purchase price of a batch of goods is a yuan. If the gross profit (what is it?) is to account for 30% of the bid price, the bid price should be a yuan?
Gross profit is the cost of making 30% after the final sale
The selling price is a * (1 + 30%) = 1.3A
2. The length of one right side of a right triangle is reduced by 25%. To keep its area unchanged, the other side should be increased ()
Suppose that the length of the original two right angles is a, B, and a becomes the original 3 / 4. To keep the area unchanged, then B becomes the original 4 / 3, 3 / 4 * 4 / 3 = 1
The answer is that the other side should grow by a third of C