Answer:
when the degree is less than 90
Explanation:
Formula for black body radiation is as follows.

where, P = power emitted
A = surface area of black body
= Stephen's constant = 
As area is given as 1.0
. Converting it into meters as follows.
(as 1 m = 100 cm)
= 
It is given that P = 201 watts. Hence,
= 
= 
T = 
= 8862.5 K
Thus, we can conclude that the temperature of the surface is 8862.5 K.
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