Variation - Jamb Mathematics Past Questions and Answers

Question 46:

• JAMB 2011

T varies inversely as the cube of R. When R = 3, T = \(\frac{2}{81}\), find T when R = 2

A. \(\frac{1}{18}\)
B. \(\frac{1}{12}\)
C. \(\frac{1}{24}\)
D. \(\frac{1}{6}\)

Question 47:

• JAMB 2012

If y varies directly as \(\sqrt{n}\) and y = 4 when n = 4, find y when n = 1\(\frac{7}{9}\)

A. \(\sqrt{17}\)
B. \(\frac{4}{3}\)
C. \(\frac{8}{3}\)
D. \(\frac{2}{3}\)

Question 48:

• JAMB 2012

U is inversely proportional to the cube of V and U = 81 when V = 2. Find U when V = 3

A. 24
B. 27
C. 32
D. 36

Question 49:

• JAMB 2013

P varies jointly as m and u, and varies inversely as q. Given that p = 4, m = 3 and u = 2 and q = 1, find the value of p when m = 6, u = 4 and q =\(\frac{8}{5}\)

A. 12\(\frac{8}{5}\)
B. 15
C. 10
D. 28\(\frac{8}{5}\)

Question 50:

• JAMB 2013

If r varies inversely as the square root of s and t, how does s vary with r and t?

A. S varies inversely as r and t²
B. S varies inverely as r² and t
C. S varies directly as r² and t²
D. S varies directly as r and t