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One copy machine can make 20 copies a minute , and a second copy machine makes 15 copies a minute. If the two copiers work together, how long would it take them to make 2100 copies?

Created: 2 years ago | Updated: 2 years ago

Updated: 2 years ago

60 minutes

105 minutes

122 minutes

140 minutes

খুলনা বিশ্ববিদ্যালয় C ইউনিট উচ্চতর গণিত সমতলে বস্তুকণার গতি (Motion of particles in a plane)

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