seller selling an apple for rs . 19 , a seller loses 1 / 6 th of what it costs him . the cp of the apple is ?
sp = 19 loss = cp 20 loss = cp − sp = cp − 19 ⇒ cp 20 = cp − 19 ⇒ 19 cp 20 = 19 ⇒ cp 20 = 1 ⇒ cp = 20 c
add(19, 1)