Question

The S.P of 10 pencils is equal to the C.P of 11pencils ?What is the profit percent

Answer 1

sp of 10 pencils=cp of 11 pencil=x
so cp of one pencil=x/11
and sp of one pencil is =x/10
profit=sp-cp=x/10-x/11
                     =x/110
profit %=profit*100/cp
              =x*100*11/110*x=10%
so profit percentage=10%

Answer 2

let the cp of 1 pencil be ₹100
cp of 11 pencil =₹1100
sp of 10=₹1100(as per the ques.)
sp of 1 pencil=₹110
profit=sp-cp=₹110-₹100=₹10
P%=p/cp×100=10/100×100=10%