Subject
Bank Exam
Topic
Dutch-Bangla Bank Ltd. - Assistant Officer - 2017
Sunny walks form point A to point B at an average speed of 5 kilometers per hour. At what speed, in kilometers per hour, must Sunny walk from point B to point A so that her average speed for the entire trip is 6 kilometers per hour ?
Sunny walks form point A to point B at an average speed of 5 kilometers per hour. At what speed, in kilometers per hour, must Sunny walk from point B to point A so that her average speed for the entire trip is 6 kilometers per hour ?
ক)
8খ)
7.5গ)
7ঘ)
9ঙ)
None of theseExplanation
Solution: প্রশ্নে বলা হচ্ছে যে, সানি A বিন্দু থেকে B তে 5 kilometers per hour বেগে যায় । B থেকে A তে কত কিলোমিটার Per hour বেগে ফিরে আসলে সমগ্র যাতায়াতে সানির গড় গতিবেগ 6 kilometers per hour হবে । দেওয়া আছে, A বিন্দু থেকে B তে যাওয়ার গতি বেগ x = 5 kilometers per hour ধরি, B বিন্দু থেকে A তে যাওয়ার গতি বেগ y kilometers per hour গড় গতিবেগের সূত্র মতে, গড় গতিবেগ = => => => 10y = 30 + 6y => y = 7.5Related questions
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