Asked by pritam | 7th Apr, 2010, 06:46: PM

Expert Answer:

Dear student,

1/p + 1/q = 1/f

put the values,

you get f = 2.5

Hope this helps.


Answered by  | 8th Apr, 2010, 12:46: PM

Queries asked on Sunday & after 7pm from Monday to Saturday will be answered after 12pm the next working day.