Variation - Jamb Mathematics Past Questions and Answers

Question 31:

• JAMB 1991

If w varies inversely as \(\frac{ur}{u + r}\) and is equal to 8 when
u = 2 and r = 6, find a relationship between u, v, w.

A. Urw = 16(u + v)
B. 16ur = 3w(u + v)
C. Urw = 12(u + v)
D. 12urw = u + v

Question 32:

• JAMB 2002

If x varies directly as √n and x = 9 when n = 9, find x when n = (17/9)

A. 4
B. 27
C. √3
D. √17

Question 33:

• JAMB 2003

x varies directly as the product of u and v and inversely as their sum. If x = 3 when u = 3 and v = 1, what is the value of x if u = 3 and v = 3?

A. 3
B. 4
C. 6
D. 9

Question 34:

• JAMB 2003

The length a person can jump is inversely proportional to his weight. If a 20 kg person can jump 1.5 m, find the constant of proportionality

A. 60
B. 30
C. 20
D. 15

Question 35:

• JAMB 2004

y is inversely proportional to x and y = 4 when x = 1/2. Find x when y = 10.

A. 2
B. 10
C. 1/5
D. 1/10