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# If a thermometer reads freezing point of water as  ${20}^{\circ }\text{c}$ and boiling point is  ${150}^{\circ }\text{c}$ how much thermometer read, when the actual temperature is  ${60}^{\circ }\text{c}$

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a
98∘c
b
110∘c
c
40∘c
d
60∘c
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detailed solution

Correct option is A

unknown thermometer , Lower Fixed point(LFP) = 200C; Upper Fixed Point (UFP)=1500C; actual reading given = 600C  the formula that relates unknown thermometer and celsius thermometer is, Z-LFPUFP-LFP=C-LFPUFP-LFP celsius thermometer has LFP=00C and UFP=1000C  substitute given values in above equation, x is reading on unknown thermometer  x-20150-20=60-0100-0  x-20=78  x=98∘c

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A faulty thermometer has its fixed points marked as 5° and 95°. The temperature of a body as measured by the faulty thermometer is 59°. Find the correct temperature of the body on Celsius scale.

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