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The temperature of two bodies measured by a thermometer are t1=200C+0.50C  and  t2=500C±0.5  0C. The error in temperature difference is

a
± 10C
b
±20C
c
±30C
d
±40C

detailed solution

Correct option is A

he temperature difference is given by t'=t2−t1=(500C±0.50C)−(200C±0.50C)t'=300C±10C

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