200
800
400
720
Source: Bangladesh Bank - Officer(Cash) - 2011
Answer: 800
Explanation:
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A motorist travels to a place 150 m away at an average speed for 50 km and returns at 30 km per hour. What is his average speed for the whole journey in km per hour ?
The average of the first and the second of three numbers is 15 more than the average of the second and the third of these numbers . what is the difference between the first and the third of these three numbers?
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১ থেকে ৪৯ পর্যন্ত ক্রমিক সংখ্যাগুলোর গড় কত?
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প্রাচীন কাল থেকে সমসাময়িক
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বাংলা সাহিত্যঃ প্রাচীন ও মধ্য যুগ
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