On selling an article at a certain price a man gains 10%. On selling the same article at double the price, gain per cent is
Let the cost price be Rs.100
Gain = 10%
SP
= Rs.110
Now, according to question make the selling price double
= 110 × 2
= Rs.220
Now, Gain will be
= 220 – 100
= Rs.120
= 120%