Question

if cost price of 6 pencils is equal to selling price of 5 pencils find the gain percent

Answer 1

let the cp of 1pencil=₹100
therefore cp of 6pencils=₹600
₹600=sp of 5 pencil(as per the ques.)
therefore sp of 1 pencil=₹120
profit=sp-cp=₹120-₹100=₹20
profit%=profit/cp×100=20/100×100=20%

ans.=20%

Answer 2

Find the amount and the cp. On rs. 15625,r=8percent p.a,t=1and a half year compounded half yearly.