alleryএখন ট্ৰাকৰ দ্ৰুতি 6 km/h হ্ৰাস কৰিলে এটা 72 km পথত 1 hour অতিৰিক্ত সময় লাগে। ইয়াৰ প্ৰকৃত দ্ৰুতি কিমান আছিল?
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-ৰ পৰা পোৱা যায় s(s-6) = 432, গতিকে s = 24 km/h।
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