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Constructing Perpendicular to a Line through a Point on the Line

A uniform the...

Question

A uniform thermometer scale is at steady state with its 0 cm mark at $20^{o}$ C and 100 cm mark at $100^{o}$ C. Temperature of the 60 cm mark is:

48^{o}

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68^{o}

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52^{o}

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58^{o}

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Solution

The correct option is A $48^{o}$ C
$G i v e n 0 c m m a r k c o r r e s p o n d i n g t o 20^{o} C 100 c m m a r k c o r r e s p o n d i n g t o 100^{o} C i t i m p l i e s t h a t 80 d e g r e e s a r e s h o w n b y 100 c m w h i c h i m p l i e s 1 c m = {0.8}^{0} C t h e r e f o r e 60 c m = 48^{0} C$

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