3. If p varies jointly as q and r, and p = 4 when q = 2 and r = 6 find p when q = 4 and r = 8
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3. If p varies jointly as q and r, and p = 4 when q = 2 and r = 6 find p when q = 4 and r = 8
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Answer:
10.67
Step-by-step explanation:
To solve this problem, we can use the formula for joint variation, which is: p = k * q * r, where k is the constant of variation.
We can find the value of k by plugging in the given values for p, q, and r:
4 = k * 2 * 6
Simplifying this equation, we get:
k = 4 / (2 * 6) = 1/3
Now that we know the value of k, we can use the formula to find p when q = 4 and r = 8:
p = (1/3) * 4 * 8 = 10.67
Therefore, when q = 4 and r = 8, p is approximately equal to 10.67.