Answer:
![92 \:cm^2](https://tex.z-dn.net/?f=92%20%5C%3Acm%5E2)
Step-by-step explanation:
![Surface\:_{area}=2\times(\ell\times w +\ell \times h + w \times h)](https://tex.z-dn.net/?f=Surface%5C%3A_%7Barea%7D%3D2%5Ctimes%28%5Cell%5Ctimes%20w%20%2B%5Cell%20%5Ctimes%20h%20%2B%20w%20%5Ctimes%20h%29)
![=2\times(8 \times 2 +8 \times 3 + 2 \times 3)](https://tex.z-dn.net/?f=%3D2%5Ctimes%288%20%5Ctimes%202%20%2B8%20%5Ctimes%203%20%2B%202%20%5Ctimes%203%29)
![=2 \times (16+24+6)](https://tex.z-dn.net/?f=%3D2%20%5Ctimes%20%2816%2B24%2B6%29)
![=2\times 46](https://tex.z-dn.net/?f=%3D2%5Ctimes%2046)
Answer: ₹500
Step-by-step explanation:
Harry earned ₹500 every day.
₹40,000 ÷ 80 = ₹500
₹40,000 divided by 80 will turn 80 days to 1 day which answers your question.
For perimeter you just add the sides up, so 15+12+9 which = 36
Let "a", "b" and "с" be sides of the triangle ("с" is the longest side). The triangle will be:
right if a² + b² = c²
аcute if a² + b² > c²
obtuse if a² + b² < c²
We have a=10, b=14 and c=18
a² + b² = 10² + 14² = 100 + 196 = 296
and
c² = 18² = 324
296 < 324 ⇒ obtuse triangle.