The first one is FALSE
The second one is TRUE
Third one is FALSE.
Answer:
90π cm²
Step-by-step explanation:
Given: Radius of circular base= 5 cm
height= 12 cm
Now finding the surface of cone.
Formula; Surface area of cone= ![\pi rl+ B](https://tex.z-dn.net/?f=%5Cpi%20rl%2B%20B)
Where; r= radius
l= slant height
B is the area of base, which is circle.
Area of circle (B)= πr²
Area of circle (B)= ![\pi \times 5^{2} = 25\pi](https://tex.z-dn.net/?f=%5Cpi%20%5Ctimes%205%5E%7B2%7D%20%3D%2025%5Cpi)
∴ Area of circle (B)= ![25\pi](https://tex.z-dn.net/?f=25%5Cpi)
Finding slant height (l)
Formula; ![l= \sqrt{r^{2}+h^{2} }](https://tex.z-dn.net/?f=l%3D%20%5Csqrt%7Br%5E%7B2%7D%2Bh%5E%7B2%7D%20%20%7D)
⇒l = ![\sqrt{5^{2}+12^{2} } = \sqrt{25+144 }](https://tex.z-dn.net/?f=%5Csqrt%7B5%5E%7B2%7D%2B12%5E%7B2%7D%20%20%7D%20%3D%20%5Csqrt%7B25%2B144%20%7D)
∴ l= ![\sqrt{169} = 13\ cm](https://tex.z-dn.net/?f=%5Csqrt%7B169%7D%20%3D%2013%5C%20cm)
Next, using the formula for finding surface area of cone.
Surface area of cone= ![5\times 13\times \pi + 25\pi](https://tex.z-dn.net/?f=5%5Ctimes%2013%5Ctimes%20%5Cpi%20%2B%2025%5Cpi)
⇒ Surface area of cone= ![65\pi +25\pi = 90\pi](https://tex.z-dn.net/?f=65%5Cpi%20%2B25%5Cpi%20%3D%2090%5Cpi)
∴ Surface area of cone= 90π cm²
10x2 is the next operation to perform after 9+6
It would 1/4 once’s an hour because you would divide 3/4 by 3
And you would get 1/4
Hope this helps!
Answer:
pt=%(whole)
x=1.6(65)
x=104.00
Step-by-step explanation:
or
<u>x</u> = <u>160</u>
65 100
160(65)=10400 divided by 100 equals 140