Pleaseeeee hellllppppp and explainnn
1 answer:
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Answer:
d =
Step-by-step explanation:
Given that W varies jointly as L and d² then the equation relating them is
W = kLd² ← k is the constant of variation
To find k use the condition W = 140 when d = 4 and L = 54, thus
140 = k × 54 × 4² = 864k ( divide both sides by 864 )
= k , that is
k =
W = Ld² ← equation of variation
Multiply both sides by 216
216W = 35Ld² ( divide both sides by 35L )
= d² ( take the square root of both sides )
d =
The correct answer is: [A]: " 
" .
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<u>Note</u>: "3/4" = "6/8" = "15/20" .
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<u>Note</u>: "3/4" = "6/8" = "15/20" .
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