1.What is the number of 360-degree rotations that a bicycle wheel made while
rolling 100 meters in a straight line without slipping?
(1)The diameter of the bicycle wheel,including the tire,was 0.5 meter.
(2)The wheel made twenty 360-degree rotations per minute.
ANS:(A)
想問第一個選項 是要先把他變成半徑嗎? 然後是用面積算還是?
2.If a certain animated cartoon consists of a total of 17280 frames on film,
how many minutes will it take to run the cartoon?
(1)The cartoon runs without interruption at the rate of 24 frames per second.
(2)It takes 6 times as long to run the cartoon as it takes to rewind the film,
and it takes a total of 14 minutes to do both.
ANS:(D)
想問第二個選項是甚麼意思 看不太懂
感謝~
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