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Judgment: After 75% of 1.1 meter cloth is used, 25% of the cloth is left choice: 1. Add 5g sugar and 100g water to the water containing 5% sugar, and the sugar content of the water is () A. Constant B. above 5% C. below 5% Fill in the blanks: 1. A cuboid shaped wood strip can be sawn into seven cube blocks, and the sum of the surface area of all cube blocks is increased by ()%
Judgment:
After 75% of 1.1 meter cloth is used up, there is 25% meter left
choice:
1. Add 5g sugar and 100g water to the water containing 5% sugar, and the sugar content of the water is (c)
A. Constant B. above 5% C. below 5%
Fill in the blanks:
1. A cuboid shaped wood strip can be sawn into seven cube blocks. The sum of the surface area of all cube blocks is 40% more than that of the original cuboid
If a student walks at 5km / h, he can get home from school on time. If he takes 1 / 3 of the whole journey, he gets on a tractor with a speed of 20km / h, so he arrives 2 hours earlier than before, and asks for the distance from school to home?
The distance from school to home is x kilometers
2X/3÷5-2X/3÷20=2
X/10=2
X=20
It's 20 kilometers from school to home
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