10+2×1.3+2.4×(12-5)=29.4元乘坐十二千米应付29.4元
10+1.3×2+(12-5)×2.4=12.6+7×2.4=12.6+16.8=29.4(元)
10+1.3+1.3+2.4×7=29.4元