Răspuns:
Explicație pas cu pas:
S = suma initiala
Prima zi S/4
Rest S - S/4 = 3S/4
A doua zi 3/10*3S/4 = 9S/40
Rest 3S/4 - 9S/40 = 30S/40 - 9S/40 = 21S/40
A treia zi 21S/40 = 270 lei
S = 40*270/21 = 514,30 lei (aproximativ)
A doua zi 9*514,30/40 = 115,72 lei