國ㄧ數學 比例 求解?
回答 (1)
2017-08-06 8:29 am
✔ 最佳答案
Let speed of Lam = x, time taken by Curry = t and speed of Curry = y. Time taken by Lam = 4t/5. Distance traveled by Curry = yt. so distance traveled by Lam = 5yt/6. So speed of Lam = (5yt/6)/(4t/5) = 25y/24 = x. Therefore speed of Lam : speed of Curry = x : y = 25y/24 : y = 25 : 24. Answer is (B).
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