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If a room is paved with 3-decimeter-long square bricks, 96 pieces can be paved. If it is paved with 4-decimeter-long square bricks, how many pieces can be paved? Such as the title
Hello, I'm glad to answer your question
Set X blocks
4²x=3²×96
16x=864
x=864÷16
x=54
Answer: 54 yuan can be covered
Hope to adopt it~
(formula calculation) for a room, it takes 1000 pieces to use 40 cm long square bricks to lay the floor; for example, how many pieces to use 50 cm long square bricks to lay the floor
You can't answer it directly. You have to make a formula
“B·ain”：
40cm × 40cm × 1000 (50cm × 50cm) = 1600000cm & sup2; △ 2500cm & sup2; = 640 (pieces)
A: it costs 640 yuan
Good luck and goodbye
It takes 2000 pieces to use 15cm square bricks to pave the classroom. If we use 30cm square bricks to pave the classroom, how many pieces at least?
Use proportion to solve. Write the quantity relation
At least x blocks are required
X：2000=15*15：30*30
900X=2000*15*15
900X=450000
X=500
It costs 500 yuan
It takes 500 pieces to use 15cm long square bricks to pave the floor of the laboratory. If we use 30cm long square bricks to pave the floor, how many pieces do we need. (solve by proportion)
If the floor is paved with 30cm square bricks, X pieces are needed, then
15²：30²=x：500
1：2²=x：500
4x=500
x=125
Answer: change to the side length is 30cm square brick floor, need 125 pieces
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