alleryएका ट्रकचा वेग 6 km/h ने कमी केल्यास त्याला 72 km च्या मार्गावर 1 hour जास्तीचा वेळ लागतो. त्याचा मूळ वेग किती होता?
A20 km/h
B24 km/h
C30 km/h
D36 km/h
Answer & Solution
Correct answer: B. 24 km/h
72/(s-6) - 72/s = 1 वरून s(s-6) = 432 मिळते, म्हणून s = 24 km/h.
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