Answer:
Number of bricks require to make the walls![=2880bricks](https://tex.z-dn.net/?f=%3D2880bricks)
Step-by-step explanation:
The number of bricks needed to make the wall:
= Volume of the wall/volume of one brick
The wall and the brick are in the shape of a cuboid:
Volume of the Cuboid= ![Length*Width*Height](https://tex.z-dn.net/?f=Length%2AWidth%2AHeight)
For wall:
![Length= 8 m\\Width=22.5 cm= 0.225 m \\Height=4 m \\](https://tex.z-dn.net/?f=Length%3D%208%20m%5C%5CWidth%3D22.5%20cm%3D%200.225%20m%20%5C%5CHeight%3D4%20m%20%5C%5C)
Volume of the wall=
![=8*0.225*4\\\\=32*0.225\\\\=7.2m^3](https://tex.z-dn.net/?f=%3D8%2A0.225%2A4%5C%5C%5C%5C%3D32%2A0.225%5C%5C%5C%5C%3D7.2m%5E3)
For one Brick:
![Length=25 cm=0.25m\\Width=12.5 cm=0.125\\Height= 8 cm=0.08m](https://tex.z-dn.net/?f=Length%3D25%20cm%3D0.25m%5C%5CWidth%3D12.5%20cm%3D0.125%5C%5CHeight%3D%208%20cm%3D0.08m)
Volume of one brick= ![Length*width*Height](https://tex.z-dn.net/?f=Length%2Awidth%2AHeight)
![=0.25*0.125*0.08\\\\=0.0025m^3](https://tex.z-dn.net/?f=%3D0.25%2A0.125%2A0.08%5C%5C%5C%5C%3D0.0025m%5E3)
Number of bricks required to make the wall:
![=7.2/0.0025=2880 bricks](https://tex.z-dn.net/?f=%3D7.2%2F0.0025%3D2880%20bricks)
![=2880bricks](https://tex.z-dn.net/?f=%3D2880bricks)
The answer would be C) 0.40 (64) = n
Answer:
The width of bookcase D is 61 cm
The width of bookcase E is 61 cm
Step-by-step explanation:
see the attached figure to better understand the problem
step 1
Sum the widths of the three bookcases A, B and C
![132+94+108=334\ cm](https://tex.z-dn.net/?f=132%2B94%2B108%3D334%5C%20cm)
step 2
Subtract the sum of the three bookcases A,B and C from the total length of the wall
![456-334=122\ cm](https://tex.z-dn.net/?f=456-334%3D122%5C%20cm)
step 3
Divide that answer in step 2 by 2, and that will let you know the widths of D and E, because they may have equal widths
![122/2=61\ cm](https://tex.z-dn.net/?f=122%2F2%3D61%5C%20cm)
therefore
The width of bookcase D is 61 cm
The width of bookcase E is 61 cm
Answer:
Step-by-step explanation:
He didn't make any mistakes all is correct
I am not sure about the formula but if you subtract 8,884 from 10,712 you get 1,828. Then, if you divide that by 4 you get 457. 457 fph(feet per hour) should be the climbers vertical speed.