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Answered

if A varies jointly as C and D, and A=20, when c=2 and d=4. find d when a=25 and c=8​

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Erachelleseconalinggo

Answer:

d = 5/2 or d = 2.5

Step-by-step explanation:

First, find the value of k;

a = kcd

20 = k(2)(4)

20 = 8k

20/8 = k

5/4 = k

Now, find d;

a = kcd

25 = 5/4 x 8 (d)

25 = 10d

25/10 = d

5/2 = d or 2.5 =d

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