The internal dimensions of an open wooden box area 12.6cm by 10.7cm by 8.4cm high. If the wood used in making 9mm thick, find the external dimensions of the box.
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Answer:
14.4cm by 12.5cm and 10.2 cm high
Step-by-step explanation:
The future mentioned above is a cuboid
The internal measurements have been given in centimeters but the thickness is in millimeters
The first step is to convert the thickness into centimeters
One centimeter is equivalent to 10millimeters
1cm — 10 mm
9mm
9 ÷ 10 = 0.9 mm
When we talk about the outer dimensions it means that the length width and height will extend around both ends
This simply means we double the thickness
0.9 × 2 = 1.8 cm
We then add the thickness to the internal measurements given
12.6 + 1.8 = 14.4 cm
10.7 + 1.8 = 12.5 cm
8.4 + 1.8 = 10.2 cm
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