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Question

What is the measurement of temperature in Celsius scale in the above figure?
635350_0c551d6535a44728bf1a478f9856d01e.png

A
25oC
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B
30oC
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C
26oC
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D
29oC
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Solution

The correct option is B 30oC
The main scale reading of thermometer reads 30oC and sub scale reading is zero.
the sub scale reading has 5 division on it and between them it has 10o
Hence each division measures about 10o5=2o
Therefore reading of thermometer is 30oC+0×2o=30oC

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