alleryএকটি ট্রাকের গতিবেগ 6 km/h হ্রাস পেলে একটি 72 km রুটে 1 অতিরিক্ত ঘন্টা সময় লাগে। এর আসল গতিবেগ কত ছিল?
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 দেয় s(s-6) = 432, সুতরাং s = 24 km/h।
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