[問題] 計量幾題請教

[victim0130 (Maxwell)]

Q1: As two wheels- A and B- roll across the ground, they both
    rotate at a rate of 60 revolutions per second. The radius of
    A is 3. The radius of wheel B is 1.5

     Quantity A                        Quantity B
 The distance wheel A              The distance wheel B
 travels per minute                travels per second

Ans: A


Q2: Dan drove home from college at an average rate of 60 miles per hour.
    On his trip back to college, his rate was 10 miles per hour slower
    and the trip took him one hour longer than the drive home. How far is
    Dan's home from the college?

Ans: 300 miles

麻煩板上大大請幫忙解惑，謝謝!!

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→ ykes60513   : 同樣轉速 本來A走的距離就比B多了呀 因為半徑比較大
→ ykes60513   : 更別提時間一個是分 一個是秒 還差了60倍
→ ykes60513   : 第二題要注意的是回程是慢了10miles/h 所以是60:50
→ ykes60513   : 速度慢了導致多一小時 S/60+1=S/50 得S=300
推 a28161086   : 我第二題還以為是等減速度..
→ victim0130  : 謝謝解說!!
推 momolo2000  : 60 *[50(h+1)=60h] ;60[5=h];60*5=300