Question

The temperature of a room heated by a heater is ${20}^o$C when outside temperature is $-{20}^o$C and it is ${10}^o$C when the outside temperature is $-{40}^o$C. The temperature of the heater is

• A. 80${}^o$C
• B. 100${}^o$C
• C. 40${}^o$C
• D. 60${}^o$C

Answer 1

The correct option is D 60${}^o$C

the temperature diffrence should be equal for equilibrium
$(t-20)=20-(-20)$;

so, $t-10=10-(-40)$
$t=60$