For k3 visa(I130 & I-129F) do they both need to get approved in order to get the visa or only one approval is enough to get the visa..

they both need to get approved for K3 Visa.. for the CR1 visa, only the I-130 needs to get approved..

It is most common that both petitions would be approved the same day. However, although an I-130 must be filed in order to receive a K3 visa, only the I-129F must be approved for the visa to be granted. The I-130 must be approved before the immigrant spouse can complete the adjustment of status to permanent resident.

ok, that was a better answer, thanks