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MATHEMATICS

JAMB 2017 - Question 21

Mathematics 2017 JAMB Past Questions - Question 21: if temperature t is directly propotional to heat h, and when t = 20 degree h = 50J, when h = 60J.

if temperature t is directly propotional to heat h, and when t = 20 degree h = 50J, when h = 60J.

A: 24

B: 20

C: 34

D: 30

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Correct Answer

Explanation

If temperature (t) is directly proportional to heat (h), we can use the formula t = kh, where k is the constant of proportionality.Given that when t = 20 degrees, h = 50J, we can find the value of k:20 = k * 50k = 20 / 50k = 0.4Now that we have the value of k, we can use it to find the temperature when h = 60J:t = 0.4 * 60t = 24So, when h = 60J, the temperature (t) is 24 degrees.