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Monday, 02 March 2026
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Make L the subjects of the formula if \(\sqrt{\frac{42w}{5l}}\)

Make L the subjects of the formula if \(\sqrt{\frac{42w}{5l}}\)
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  • A \(\sqrt{\frac{42w}{5d}}\)
  • B \(\frac{42W}{5d^2}\)
  • C \(\frac{42}{5dW}\)
  • D \(\frac{1}{d}\sqrt{\frac{42w}{5}}\)
Correct Answer: Option B
Explanation:
\(\sqrt{\frac{42w}{5l}}\)
square both side of the equation
\(d^2 = \left(\sqrt{\frac{42W}{5l}}\right)^2\\
d^2 = \frac{42W}{5l}\\
5ld^2=42W\\
l = \frac{42W}{5d^2}\)

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