Two spirals of an electric stove of the same resistance are connected in parallel and connected to a network

Two spirals of an electric stove of the same resistance are connected in parallel and connected to a network with a voltage of 220 V. What is the resistance of one spiral, a tile, if water is a mass. 1 kg boiled when heated on this stove after 43 seconds? The initial water temperature is 20 ° C, and the efficiency of the process is 80%. Energy used to heat water is considered useful. (The specific heat capacity of water is 4.2 * 10^3 (to the 3rd degree) J / (kg • K).)

R1 = R2; I1 = I2 => U1 = 110B = U2
Ap = 1 * 4200 * 80 = 336,000 J
Efficiency = Ap / Az * 100%
Az = Ap / KP D * 100%
Az = 336,000: 0.8 = 420,000 J
Az = Ult = 43’220’I
I = 44.4 A
R1 = 110 / 44.4 = 2.48 ohm
Answer: 2.48 ohm