Adeyemi who is 15 years old is 3 years older than his younger brother Ojo . If Okonkwo the eldest brother is 21 years old . What is the average of the three brothers.

The approximate volume of the redwood tree trunk is

Step-by-step explanation:

we know that

The volume of the cylinder (approximate volume of the redwood tree trunk) is equal to

where

B is the area of the base

H is the height of the tree

step 1

Find the radius of the base

The circumference is equal to

we have

substitute and solve for r

Solve for r

step 2

Find the area of the base B

The area of the base of cylinder (tree) is equal to

we have

substitute

step 3

Find the volume

we have

substitute