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Physics
Physics
Problem
Hot water cools from
60
∘
C
60^{\circ}\text{C}
6
0
∘
C
to
50
∘
C
50^{\circ}\text{C}
5
0
∘
C
in the first 10 minutes and to
42
∘
C
42^{\circ}\text{C}
4
2
∘
C
in the next 10 minutes. The temperature of the surroundings is: a.
25
∘
C
25^{\circ}\text{C}
2
5
∘
C
b.
10
∘
C
10^{\circ}\text{C}
1
0
∘
C
c.
15
∘
C
15^{\circ}\text{C}
1
5
∘
C
d.
20
∘
C
20^{\circ}\text{C}
2
0
∘
C
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