Mostafa had traveled 1/3 of the total distance of his trip when his car broke down. He finished the journey on foot, spending twenty times as long walking as he had spent driving. How many times faster was his driving speed than his walking speed?
A. 10
B. 12
C. 15
D. 20
E. None of these
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সঠিক উত্তরঃ
A.
10
Explanation:
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