Question

in amercury of a thermometer the ice point lower fiwed point is marked as 10degree celcius and the steam point [upper point]is marked as 130degre celcius .at 40degree celcius temperature what will this thermometer read 1]78 deg. 2]66deg. 3]62deg 3] 58 deg

Answer 1

Explanation:

Let the temperature in given scale be x.

Consider a straight line as a relation between given and celsius scale. 

We get, 130−10x−10=100−040−0

where, 0 and 10 are lowest fixed point for celsius and given scale and 130 and 100 are highest fixed point for given and celsius scale.

  

⇒130−10x−10=10040

⇒100x−1000=4800

⇒100x=5800

⇒x=580