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If it takes 5 identical firetrucks 5 minutes to pump 5 kiloliters of water onto a fire, how long will it take 8 firetrucks pump 8 kiloliters? Hint: the answer isn't 8 minutes.
The value of \(y\) varies inversely with \(x.\) If \(y=6\) when \(\displaystyle x=\frac{8}{3},\) what is the value of \(y\) when \(x=5 ?\)
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Suppose there is a water faucet that can fill a \(575\)-liter-tank in \(100\) minutes. How many faucets do we need to fill this tank in \(4\) minutes?
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A cruise ship rents for \(\$800\) a day. If \(8\) people go on a trip by this ship, what is the cost per capita?
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Calvin is planning to visit his hometown during Thanksgiving Holidays. It will take \(9\) hours if he drives at \(85 \text{ km/h}.\) How long will it take if he drives at \(102 \text{ km/h} ?\)
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If \(z\) varies directly as \(x\) and inversely as \(y,\) how many times larger does \(z\) get if \(x\) is increased by \(2\) times and \(y\) is decreased by \(7\) times?
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