Pedro should buy \(\boxed{\bf 3\text{\bf\ meters}}\) of the shelving.
Further explanation:
Procedure used:
The following steps are involved to find the value of \(y\text{ unit}\) where \(y\) is any real number.
1) If one unit is \(x\) then multiply \(y\) with \(x\).
2) The resultant number is \(xy\).
Given:
Pedro is building a spice rack with \(4\text{ shelves}\) and length of each rack is \(0.55\text{ meters}\). He can only buy whole number of lengths.
Calculation:
Step 1:
The length of the shelf is \(0.55\text{ meter}\).
Multiply \(4\) by \(0.55\) to calculate the length of \(4\) shelves.
\(\begin{aligned}l&=\4\times 0.55\\&=2.20\end{aligned}\)
Here, \(l\) represents the length of the \(4\) shelves.
Step 2:
Pedro can only buy whole number lengths.
In the \(\text{step }1\) we can see the length of the shelf is not appropriate as he can by only whole numbers.
Pedro needs exactly \(2.2\text{ meters}\) of shelving.
Therefore, the number \(2.20\) lies between \(2\) and \(3\).
The number \(2\) is not correct as the length should be at least \(2.20\text{ meters}\).
Therefore, Pedro should buy \(3\text{ meters}\) of the shelving.
Thus, the required length of the shelf is \(\boxed{\bf 3\text{\bf\ meters}}\).
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Answer details:
Grade: Junior school
Subject: Mathematics
Chapter: Units and measurement
Keywords: Pedro, spice rack, meters, building rack, shelf, lengths, measurement, unit, decimal, fractions, numbers, numbering system, rational number, whole numbers.
