Question

The fundamental intervals of two thermometers X and Y are ${70}^{\circ }$ and ${140}^{\circ }$ respectively. Their ice points are ${10}^{\circ }$ and $0^{\circ }$ respectively. If Y reads ${90}^{\circ }$. What would X read?

Answer 1

As given

$\frac{X-10}{70}=\frac{Y-0}{140}$

Now when $Y={90}^o$

So $\frac{X-10}{70}=\frac{90}{140}$

$X={55}^0$