Calculate Area with D:d:p = 4:1:4

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The discussion focuses on calculating the area using the equation A = pi * (D^2 * d^2) * p * n * k, with specific values for n and k set at 0.5 and 0.4, respectively. The values of D, d, and p are given in a ratio of 4:1:4, leading to the interpretation that D and p are each four times the value of d. Clarification is sought on whether the values of D, d, and p represent numbers or proportions. The conclusion reached is that D equals 4d and p equals 4d, confirming the proportional relationship. Understanding this ratio is essential for accurately calculating the area.
hpla
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hey >>>

i want to Calculate this area Equation :

A= pi *(D^2*d^2)*p*n*k

n= 0.5
k=0.4

but the Valuable of ( D-d-p) given like this :

D:d:p
4 1 4

My question is :

i don't understand Valuable of ( D-d-p)

is it Number or proportion ... just can anyone make it clear to me

Please, Please, Please,
 
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It looks like a series proportion to me. D and p are each 4 times the value of d.
 
Thank you for your response .. u mean

D= 4d P=4d
 
Yes.
 

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