0) Длина стороны второго поля: 1.4 + 0.1*1.4 = 1.1*1.4 = 1.54 км.
1) P1 = 4*1.4 = 5.6 км. P2 = 4*1.54 = 6.16 км.
5.6/100 = 6.16/x; x = (6.16*100)/5.6 = 110%
Больше на 110 - 100 = 10%
2) S1 = 1.4*1.4 = 1.96 км^2; S2 = 1.54*1.54 = 2.3716 км^2.
1.96/100 = 2.3716/x; x = (2.3716*100)/1.96 = 121%
Больше на 121-100 = 21%