(1) X小时=60X 分钟
A 计时制收费 =[(0.25/3)+0.02]*60X =6.2X
B 包月制收费 =100+0.02*60X=100+1.2X
(2)30小时=1800分钟
A 计时制收费 =[(0.25/3)+0.02]*1800 =186(元)
B 包月制收费 =100+0.02*1800=136(元)
∵186>136 ∴ B包月制划算
(1) X小时=60X 分钟
A 计时制收费 =[(0.25/3)+0.02]*60X =6.2X
B 包月制收费 =100+0.02*60X=100+1.2X
(2)30小时=1800分钟
A 计时制收费 =[(0.25/3)+0.02]*1800 =186(元)
B 包月制收费 =100+0.02*1800=136(元)
∵186>136 ∴ B包月制划算