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Question
Figure shows a measuring scale which is usually supplied with a geometry box. 
Which of the following distance cannot be measured with this scale by using it only once?
(a) 0.1 m
(b) 0.15 m
(c) 0.2 m
(d) 0.05 m
Figure shows a measuring scale which is usually supplied with a geometry box. Which of the following distance cannot be measured with this scale by using it only once?
(a) 0.1 m
(b) 0.15 m
(c) 0.2 m
(d) 0.05 m
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Solution
The correct option is C 0.2 m
The length of the scale is 15 cm. It is the maximum length the scale can measure by using it once.
We know, 1 m = 100 cm.
In the question, the lengths are,
0.1 m = 10 cm (less than 15 cm),
0.15 m = 15 cm (equal to 15 cm),
0.2 m = 20 cm (more than 15 cm),
0.05 m = 5 cm (less than 15 cm).
Therefore, out of the following options, we cannot measure 20 cm.
The length of the scale is 15 cm. It is the maximum length the scale can measure by using it once.
We know, 1 m = 100 cm.
In the question, the lengths are,
0.1 m = 10 cm (less than 15 cm),
0.15 m = 15 cm (equal to 15 cm),
0.2 m = 20 cm (more than 15 cm),
0.05 m = 5 cm (less than 15 cm).
Therefore, out of the following options, we cannot measure 20 cm.
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