Question

The temperature rises by 20°F what is the rise in Celsius scale

Answer 1

$$t\:{^\circ \rm C}=\frac{5}{9}t\:{^\circ \rm F}-32$$

$$\Delta t\:{^\circ \rm C}=\frac{5}{9}\Delta t\:{^\circ \rm F}$$

$$\Delta t\:{^\circ \rm C}=\frac{5}{9}*10\:{^\circ \rm F}=5.6\:{^\circ \rm C}$$