A shopkeeper sells 5 mangoes at a price he bought 4 mangoes. What percentage (%) of loss or gain?

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Job Solution Oil & Gas Co. Ltd Bakhrabad Gas Systems Ltd - Asst. Officer - 29.12.2006 গণিত
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A company owns some land and buildings for which the following details are relevant : Cost of land Taka 50,000; cost of building Taka 100,000, estimated life of building 20 years, estimated residual value of building Taka 2000; estimated residual value of land Taka 50,000. The company uses the straight line depreciation method. Which is the correct annual depreciation charge for this asset?

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Job Solution Oil & Gas Co. Ltd Sylhet Gas Field Co - Asst. Manager -14.06.2013 গণিত
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A can do a piece of work in 10 days. While B alone can do it in 15 days. They work together for 5 days and the rest of the work is done by C in 2 days. If they get Tk 450 for the whole work, how much money C should get from the whole?

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Job Solution Oil & Gas Co. Ltd Sylhet Gas Field Co - Asst. Manager -14.06.2013 গণিত
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By walking at 3/4 of his usual speed, a man reaches his office 20 minutes later than usual. His usual time is :

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Job Solution Oil & Gas Co. Ltd Sylhet Gas Field Co - Asst. Manager -14.06.2013 গণিত
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২.৫ মিটার বর্গাকার একটি খোলা চৌবাচ্চায় ২৮,৯০০ লিটার পানি ধরে। এর ভিতরে এলুমিনিয়ামের পাত লাগাতে প্রতি বর্গমিটারে ৫ টাকা হিসাবে মোট কত খরচ পড়বে?

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Job Solution Oil & Gas Co. Ltd Bangladesh Gas Field Co - Asst. Manager - 08.04.2011 গণিত
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একটি মইয়ের এক প্রান্ত ভূমি থেকে ১৫ মিটার উঁচু ঘরের জানালা বরাবর পৌছায়। অপর প্রান্ত ঘর থেকে ৮ মিটার দূরে থাকলে মইয়ের দৈর্ঘ্য কত মিটার?

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Job Solution Oil & Gas Co. Ltd Bangladesh Gas Field Co - Asst. Manager - 08.04.2011 গণিত
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