Which of the following is a better estimate for the length of a pen?
A
15 centimeter
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B
5 meter
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C
5 millimeter
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D
15 kilometer
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Solution
The correct option is A 15 centimeter Metre and kilometre are too large to measure a pen, whereas millimetre is too small. Usually, a pen has a size comparable to a 15 cm long ruler. Hence, 15 cm is the best option.