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21-01-2015
Mathematics

Answered

After the first 15 minutes of laying down cement, you have used 1/5 of the bag. What is the rate you are laying cement in bags per hour?

Answer :

21-01-2015

[tex]15\ minutes=\frac{15}{60}hour=\frac{1}{4}hour\\\\ \frac{1}{4}h-\frac{1}{5}\ bag\\ 1\ hour-\ x\ bag\\\\ cross\ multiplication\\ \frac{1}{4}x=\frac{1}{5}\ \ \ | multiply\ by\ 4\\\\ x=\frac{4}{5}\\\\ Rate\ is\ equal\ to\ \frac{4}{5}\ bag\ per\ 1\ hour.[/tex]

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