Question

a person by pencil at 11 for rupees 10 and sell it at 10 for rupees 11 find profit percent​

Answer 1

Answer:

let cp of one pencil be x

11x=10

x=10÷11

cp of one pencil=10÷11

sp =10x=11

then take lcm of 10,11

Lcm=110

first

cp=10÷11×110

cp=100

sp of 110=11÷10×110

sp=121

profit

sp-cp

121-100

21

profit =21

p%=21÷100×100

p%=21%