Find the amount after some time
Start with the initial amount and add or subtract the rate once for each time period.
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See worked examples
A pool holds 37 L of water and a hose adds 9 L every minute. How many L are there after 2 minutes?
Answer: 55
A hiker is 31 km from camp and walks toward it at 6 km every hour. How many km are there after 8 hours?
Answer: -17
A candle is 19 cm tall and burns down 7 cm every hour. How many cm are there after 8 hours?
Answer: -37
Tip: Start with the initial amount and add or subtract the rate once for each time period.
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- Next in this topic Find the time when a target amount is reached Grade 8
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