Here, (SP of 33m)-(CP of 33m) = Gain = SP of 11m.
This means, CP of 33m = (SP of 33m)-(SP of 11m) = SP of 22m.
Let the CP of each meter be Re 1. Then,
CP of 33m = Rs 33.
SP of 11m = (SP of 22m)/2 = (CP of 33m)/2 = Rs 33/2.
Percentage of Gain = Gain/CP × 100%
= (SP of 11m)/(CP) × 100%
= (33/2)/(33) × 100%
= 50%.
