Questions
A body cools from 500C to 400C in 5 min. The surrounding temperature is 200C. In what further time (in minute) will it cool to 300C?
a
5
b
152
c
253
d
10
detailed solution
Correct option is C
Applying, T1−T2t=αT1+T22−T0, we get 50−405=α50+402−20 …(i)and 40−30t=α40+302−20 …(ii)Solving these two equations, we gett=253minTalk to our academic expert!
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