Make L the subject of the formula if d sqrt fra... - JAMB Mathematics 2007 Question
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
\(\frac{42W}{5d^2}\)
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 = \(\frac{42W}{5d^2}\)
= d2 = \(\frac{42W}{5L}\)
cross multiply: 5d2L = 42W
divide both sides by 5d2
L = \(\frac{42W}{5d^2}\)
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