选择题
2026 AMC 8 Problem 7: Electric Bike Range
Mika would like to estimate how far she can ride a new model of electric bike on a fully charged battery. She completed two trips totaling 40 miles. The first trip used 1/2 of the total battery power, while the second trip used 3/10 of the total battery power. How many miles can this electric bike go on a fully charged battery?
2026 AMC 8 第7题：电动自行车练习场
米卡想估计她可以在充满电的电池上骑一辆新型电动自行车多远。她完成了两次旅行，总里程为 40 英里。第一次行程使用了电池总电量的 1/2，第二次行程使用了电池总电量的 3/10。这辆电动自行车充满电后可以行驶多少英里
A.
45
B.
48
C.
50
D.
52
E.
55