The equation used for determining the bearing capacity of a group of friction piles is __________
(a) Qup = Rf + Rp
(b) Qug = n Qup . ηg
(c) Qug = n Qup / ηg
(d) None of the mentioned
I had been asked this question in an international level competition.
The question is from Group Action in Piles in chapter Pile Foundations of Geotechnical Engineering II