Question

the CP of two watches taken together is 840 rupees. if by selling one at a profit of 16% and other at a loss of 12% there is no gain or loss in the whole transaction. then find the CP of each watch.pls answer it fast!!!!!!!

Answer 1

Actually on question some what error is there.
suppose if question is to find s p then you can check this steps

step 1
c p of first watch = 840 / 2 = 420
profit %              = 16
s p of the first watch = [(100 + profit%) / 100 ] x c p
                                = (116 / 100) x 420
                                = 487.20
c p of second watch = 420
loss %                       = 12
s p of the second watch = [(100-loss%) / 100] x c p
                                     = (88/100) x 420
                                      = 369.60