Question

find the lateral area of the cone to the nearest whole number

Answer 1

hold on one minute

Answer 2

the two numbers are 4 and 4.5 right

Answer 3

I looked at the wrong problem @Kstate yes

Answer 4

LA = π* r * l
To find l : 2^2 + 4.5^2 = l^2
I^2=24.25
I=sqrt(24.25)
I=4.92

LA=3.14*2*4.92
LA=30.8 m^2

Answer 5

@agent0smith this is the problem

Answer 6

says that what @nurali said what incorrect...

Answer 7

\(\bf \textit{Lateral Surface of a Cylinder}=\pi r\sqrt{\textit{slant height}}
\)

so do you know what the slant height is?

Answer 8

ahemm \(\bf \textit{Lateral Surface of a Cone}=\pi r\sqrt{\textit{slant height}}\) rather

Answer 9

Lateral Surface Area of Cone = pi * R * L
where R is radius and L is slant height.\
Is 4m the radius or the diameter in the diagram?

Answer 10

4m is the radius

Answer 11

\[4^2+4.5^2=C^2\]
\[16+20.25=C^2\]
\[36.25=C^2\]
\[6 \approx C\]

Answer 12

that just doesn't look right

Answer 13

I nurali did it correctly. I assume the 4 m is the diameter and the radius is 2
the slant height is
\[\sqrt{ \left(\frac{9}{2}\right)^2 + 2^2 } \\
= \frac{\sqrt{97}}{2}\]
the lateral area is pi* r* s =
\[ 2\pi \cdot \frac{\sqrt{97}}{2} = \pi \sqrt{97}= 30.94 \approx 31\]

Answer 14

Lateral Area = pi * r * l
If radius is 4m: A = pi * 4 * sqrt(4^2 + 4.5^2) = 75.7 rounded up to 76 m^2
If diameter is 4m: A = pi * 2 * sqrt(2^2 + 4.5^2) = 30.9 rounded up to 31 m^2

Answer 15

ah @phi I understand now & @nurali thanks for the help I just didn't understand really well what you were doing

Answer 16

My Pleasure.