CE 80 Questions MC

Question

when the hour hand has turned through an agle of x , what is the angle through which the minute hand has turned ?

The answer is 12x .
please answer with explanations...THX

Answer 1

When the minute hand turn 360 degree, the hour hand turn (1/12)*360 = 30 degree

Therefore, the angle ratio for minute hand and hour hand = 360/30 = 12

Therefore, when hour hand turn x degree, minute hand turn 12x degree

Answer 2

時鐘由 12 → 1 → 2 → 3 ................ → 12 共有 12 格

時針 得了1格 例如 由 12 → 1，分針便行了 12 格了，所以 分針 比 時針 行快 12 倍。