2017
Mathematics
67ca00ce0c643c71d77dee1f
If temperature t is directly proportional to heat h, and when t = 20oC, h = 50 J, find t when h = 60J
A.
24°C
B.
20°C
C.
34°C
D.
30°C
Correct Answer: 24°C
Explanation
t ∝ h, t = 20, h t = ? h = 60 t = kh where k is constant 20 = 50k k = 20/50 k = 2/5 when h = 60, t = ? t = 2/5 × 60 t = 24°C
t ∝ h, t = 20, h t = ? h = 60 t = kh where k is constant 20 = 50k k = 20/50 k = 2/5 when h = 60, t = ? t = 2/5 × 60 t = 24°CTHIS WEEK's
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