Question on: JAMB Mathematics - 2007
Make L the subject of the formula if d = (\sqrt{\frac{42W}{5L}})
A
\(\frac{1}{d}\sqrt{\frac{42W}{5}}\)
B
\(\frac{42}{5dW}\)
C
\(\sqrt{\frac{42W}{5d}}\)
D
\(\frac{42W}{5d^2}\)
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Correct Option: D
d = (\sqrt{\frac{42W}{5L}}), square both sides
= d2 = (\frac{42W}{5L})
cross multiply: 5d2L = 42W
divide both sides by 5d2
L = (\frac{42W}{5d^2})
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