Question

The cost price of 11 pencils is equal to the selling price of 10 pencils. find the loss or gain percent

Answer 1

hey mate here is your answer
let cp of 1 pencil be rs 1
then cost of 11 pencils be rs 11

let sp of 1 pencil be 1 rs.
let sp of 10 pencil be 10 rs

sp of l0 pencil☺=cp of 11 pencil =rs11
then cp =10
and sp =11
here sp greater than cp(gain)
gain =sp -cp
11-10=1
gain%=gain/cp×100
1/10×100=10%
hope it helps.....
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