If the side length of a square is increased by 1cm, its area will be increased by 9cm. Find the side length of the square How to set up the equation
Let the side length be X
(x + 1) - x = 9
It's easy to get x = 4. Let's do it by ourselves
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- 1. If one side of a square is increased by 2cm and the other side by 1cm, the area of the rectangle is 14cm2 more than that of the square, then the length of the original square is______ cm.
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- 5. A rectangular food box, 20cm in length, 15cm in width and 30cm in height. If a circle of brand paper is pasted around it (not pasted above and below), how many square centimeters is the area of this brand paper at least?
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- 8. There are three cubes of iron, their surface areas are 24 square centimeter, 54 square centimeter and 294 square centimeter respectively. Now we melt three pieces of iron into a big cube, and find the volume of this big cube
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- 10. The surface area of the three cubes is 24 square cm, 54 square cm, 294 square cm. The three cubes are fused into a large cube to obtain a large volume
- 11. If each side of a square is increased by 1 cm, the area will be increased by 17 square centimeters. What is the area of the original square?
- 12. Ask a math problem: a square's side length is increased by 4cm, and its area is increased by 40cm RT
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- 14. If the length of each side of a square is increased by 1 cm, the area of the original square will be increased by 17 cm
- 15. If the side length of a square is increased by 2 cm, its area will be increased by 24 square cm. How many cm is the original side length of the square? Xinye spectator you answer: (24-2 × 2) △ 2 △ 2 = 5 (CM) Excuse me: why subtract 2x2 from 24? The difference is divided by 2 divided by 2?
- 16. If the length of each side of a square is increased by 1 cm, the area will be increased by 17 cm. What is the area of the original square?
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