If a copier makes 3 copies every 4 seconds, then continues a this rate, how many minutes will it take to make 9,000 copies?
ক. 60
খ. 100
গ. 200
ঘ. 3000
উত্তর: 200
ব্যাখ্যা: Let [গণিত] seconds [গণিত] make 9,000 copies. We get [গণিত] . Cross multiply [গণিত] get: [গণিত] Simplify: [গণিত] Solve: [গণিত] SECONDS There are 60 seconds in a minute. [গণিত] So, it takes 200 MINUTES [গণিত] make 9000 copies.
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