20 machines times their constant respective rate in 20 minutes can produce 48 letters. Therefore,\(20*(r) * 20 = 48,\)
Rate\((r)=\frac{48}{20} * \frac{1}{20} => r= \frac{48}{400}\)
30 machines in 1 hour (60 minutes) will produce how many letters:
\(30 * \frac{48}{400} * 60 = 3*\frac{48}{4}*6 = 18*12=216\)
Option: D
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Rate\((r)=\frac{48}{20} * \frac{1}{20} => r= \frac{48}{400}\)
30 machines in 1 hour (60 minutes) will produce how many letters:
\(30 * \frac{48}{400} * 60 = 3*\frac{48}{4}*6 = 18*12=216\)
Option: D
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