GIVEN: 1/f= 1/v + 1/u ;find v,if u=3f and f=10.   ANSWER- 15

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llltkl | College Teacher | (Level 3) Valedictorian

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Given: `(1/f) =(1/v+1/u)`

f=10 then u=3f=3*10=30

Now, plugging in the values of f and u in the above relation:



` rArr 1/v=1/10-1/30`


`rArr 1/v=2/30`

`rArr v=15`

Therefore, the value of v is 15.