Answer:
![= 100](https://tex.z-dn.net/?f=%20%3D%20100)
Step-by-step explanation:
TSA of brick → 2(L×b+b×h+h×l)
![= 2(22.5× 10 + 10 \times 7.5 +7.5 \times 22.5)](https://tex.z-dn.net/?f=%20%3D%202%2822.5%C3%97%2010%20%2B%2010%20%5Ctimes%20%207.5%20%2B7.5%20%5Ctimes%2022.5%29)
![= 2 (225 +75 + 168.75) cm²](https://tex.z-dn.net/?f=%20%3D%202%20%28225%20%2B75%20%2B%20168.75%29%20cm%C2%B2)
![=2 ( 468.75) cm ²](https://tex.z-dn.net/?f=%20%3D2%20%28%20468.75%29%20cm%20%C2%B2)
![= 937.5cm²](https://tex.z-dn.net/?f=%20%3D%20937.5cm%C2%B2)
![=0.09375 m²](https://tex.z-dn.net/?f=%20%3D0.09375%20m%C2%B2)
Therefore, Required number of Bricks-
![= \frac{9.375 {cm}^{2} \times 100}{0.09375 \: {cm}^{2} }](https://tex.z-dn.net/?f=%20%3D%20%20%5Cfrac%7B9.375%20%7Bcm%7D%5E%7B2%7D%20%20%5Ctimes%20100%7D%7B0.09375%20%20%5C%3A%20%7Bcm%7D%5E%7B2%7D%20%7D%20)
![= 100](https://tex.z-dn.net/?f=%20%3D%20100)
- Hence,The required Number of Bricks = 100 respectively.
30.48 centimeters. that's the answer :)
Answer:$38.70
Step-by-step explanation:
20% = 5
48 / 5 = 9.6
20% = $9.60
48 - 9.6 = $38.7