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A container is filled with water. Now there are three balls, big, middle and small, which sink into water for the first time; take out the ball for the second time, which sink into water; take out the ball for the third time, which sink into water. The water overflowing from the container for the second time is three times that of the first time, and the third time is two times that of the second time, How many cubic centimetres is the volume of the big ball? (when taking the ball, the amount of water in the container remains unchanged) I need a clear solution process,
After taking out the small ball for the second time, the water is less than 2 cubic centimeter. After putting it into the middle ball, it overflows 2 * 3 = 6 cubic centimeter of water. Then the middle ball can be regarded as two parts: one part makes the container full of water, that is, 2 cubic centimeter, and the other part makes the water overflow, that is, the volume of the 6 cubic centimeter middle ball is 8 cubic centimeter
It takes 26 seconds for the train to pass through a 256 meter long tunnel (i.e. from the front entrance to the rear exit). At this time, it takes 16 seconds for the train to pass through a 96 meter long tunnel. Find the length of the train
Suppose the length of the train is x meters, from the meaning of the question: 256 + X 26 = 96 + x 16, the solution is: x = 160, answer: the length of the train is 160 meters
As shown in the figure, in the triangle, BD = 2dc, AE = 2DE, FC = 7, then what is AF?
Through point D, the parallel line DG of BF intersects with point G, because BF ‖ DG, BD = 2dc, so FG = 2gc, and because FC = FG + GC = 7, so FC = 2gc + GC = 7, & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; 3gc = 7, & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp
How many kilometers is 4.1 light years
It must be written in scientific notation!
It must be written in scientific notation!
It must be written in scientific notation!
1 light year = 9.04653 × 10 ^ 12km
4.1 light year = 3.7090773 × 10 ^ 13km
The math problem is that Xiaoming's mother and father each gave 50 yuan, Xiaoming bought 97 yuan shoes, left 3 yuan, he returned to his parents. He had 1 yuan left
In this way, Xiaoming took 49 yuan from his parents. 49 plus 49 is 98 yuan. Plus one yuan from Xiaoming, it is 99 yuan. Where is the remaining one yuan?
It's urgent
If you borrow 100 and give it back to your parents, you only borrow 98 or 97 to buy shoes and have 1 left
It is known that in ladder ABCD, ad ‖ BC, m and N are the midpoint of BD and AC respectively (as shown in the figure)
(1) It is proved that: connect am and extend, intersect BC at point E (as shown in Figure 2), ∵ ad ∥ BC, ∵ dam = ∵ BEM, ∵ ADM = ≌ EBM (AAS), ∵ am = me, ad = be, ∵ m, n are the midpoint of AE and AC respectively,
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