write down the upper bound of a lengthmeasured correct to the nearest metre.
Question
write down the upper bound of a lengthmeasured correct to the nearest metre.
Solution
When a length is measured correct to the nearest metre, the measurement is rounded to the closest whole number.
For example, if the actual length is 5.4 metres, it would be rounded down to 5 metres. If the actual length is 5.6 metres, it would be rounded up to 6 metres.
The upper bound of a length measured to the nearest metre is therefore half a metre more than the rounded measurement.
So, if a length is stated as 5 metres (to the nearest metre), the upper bound would be 5.5 metres. This is because any length greater than 5.5 metres would be rounded up to 6 metres.
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