Question on: JAMB Mathematics - 2007
Make L the subjects of the formula if (\sqrt{\frac{42w}{5l}})
A
\(\sqrt{\frac{42w}{5d}}\)
B
\(\frac{42W}{5d^2}\)
C
\(\frac{42}{5dW}\)
D
\(\frac{1}{d}\sqrt{\frac{42w}{5}}\)
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Correct Option: B
(\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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