Rate problems: how much in a different time
Find the amount per unit of time, then multiply by the new time.
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A machine makes 16 metres of rope in 4 hours. At the same rate, how many metres of rope does it make in 36 hours?
Answer: 144
A machine makes 18 bottles in 3 minutes. At the same rate, how many bottles does it make in 6 minutes?
Answer: 36
A machine makes 120 bottles in 4 minutes. At the same rate, how many bottles does it make in 32 minutes?
Answer: 960
Tip: Find the amount per unit of time, then multiply by the new time.
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