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Standard XII
Physics
Question
Certain quantity of water cools from
70
o
C
to
60
o
C
in the first
5
minutes and to
54
o
C
in the next
5
minutes. The temperature of the surroundings is ;
45
o
C
20
o
C
42
o
C
10
o
C
A
10
o
C
B
45
o
C
C
20
o
C
D
42
o
C
Open in App
Solution
Verified by Toppr
60
−
70
5
=
−
K
(
65
−
T
)
54
−
60
5
−
K
(
57
−
T
)
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