a pipe made of metal 1cm thick , has and external radius of 11cm. find the volume of metal used in making 2.4 m long pipe

The volume of metal used in making 2.4 m long pipe is 1.58 cm³

Step-by-step explanation:

From the question,

The external radius is 11cm.

Also, the thickness of the pipe is 1cm, then we can determine the internal radius.

Internal radius = External radius - the thickness

Internal radius = 11cm - 1cm

Internal radius = 10cm

Now, to find the volume of metal used in making the long pipe,  

The volume of metal used in making the long pipe is the difference between the volume of the external cylinder and the volume of the internal cylinder.

Volume of a cylinder is given by the formula below

Where is the volume of the cylinder

is constant ( Take = 3.14)

is the radius

and is the height

Let the radius of the external cylinder be R,

then, R = 11 cm = 0.11 m

and let the radius of the internal cylinder be r

then, r = 10 cm = 0.10 m

Then,

The volume of metal used in making the long pipe =

=

=

=

=

= 0.0158 m³ or 1.58 cm³

Hence, the volume of metal used in making 2.4 m long pipe is 1.58 cm³

the answer is; biodiversity resulting from few ancestors

adaptive radiation occurs when a population is subjected to a large natural environment with spatial ecological variations. the parts of the population in the different ecologies begin to adapt to their local environments. due to non-random mating across the large populations, this causes the different populations from the large population to speciate within their local environments. they, therefore, diverge to different species sharing a common ancestor.  

answer: 16

step-by-step explanation: first you would add 6+6 which equals 12 then add 2+2 which equals 4. then add 12 + 4 which is 16.

hope this ^_^