This problem is a present worth problem, where you need to calculate its present amount. this can be solved using the formula:
P = F(1+i)^(-n)
where p is the present value
f is the future value
i is the interest rate
n is the number of years
substituting the given to the formula
P = (500000) ( 1 + 0.1)^(-20)
P = 74,321 is current value of the inheritance that is 500,000 that 20 years from now
I don't know what the shape is so I can't help....
P = R - C
R - C = P
- C = P - R
Multiply both sides by - 1
-C*-1 = -1*(P - R)
C = -P + R
C = R - P
To answer your question, I need to know the radius or diameter and the height of the object
7 goes into 6,300 900 times so your answer is 6,300