Question

1/30=1/v+1/-10
Find the value of V?? ?

Answer 1

Answer:

30 / 4 is the correct answer

Answer 2

Answer:

$\:\:\:\:\:\frac{1}{30} = \frac{1}{v} + \frac{1}{ - 10} \\ \therefore \: \frac{1}{30} = \frac{1}{v} - \frac{1}{10} \\ \therefore \: \frac{1}{30} + \frac{1}{10} = \frac{1}{v} \\ \therefore \: \frac{1}{30} + \frac{3}{30} = \frac{1}{v} \\ \therefore \: \frac{1 + 3}{30} = \frac{1}{v} \\ \therefore \:\frac{1}{v} = \frac{4}{30} \\ \therefore \:v = \frac{30}{4} \\ \huge \fbox{ \therefore \:v = 7.5 \: units}$