Two temperature scales A and B are related by :
`(A-42)/(110)=(B-72)/(220)`
At which temperature two scales have the same reading ?

Answer

C

Explanation

Let at temperature T both the scales A and B have the same reading.
`:. (T-42)/(110) = (T-72)/(220) or 2T - 84 = T-72 or T= +12^(@)`