Variation - Jamb Mathematics Past Questions and Answers

Question 51:

• JAMB 2014

y varies directly as w². When y = 8, w = 2. Find y when w = 3

A. 18
B. 12
C. 9
D. 6

Question 52:

• JAMB 2014

P varies directly as Q and inversely as R. When Q = 36 and R = 16, P = 27. Find the relation between P, Q and R.

A. $P=\frac{Q}{12R}$
B. $P=\frac{12Q}{R}$
C. $P=12QR$
D. $P=\frac{12}{QR}$

Question 53:

• JAMB 2015

The extension of a stretched string is directly proportional to its tension. If the extension produced by a tension of 8 Newton’s is 2cm, find the extension produced by a tension of 12 newton’s.

A. 2
B. 1
D. 3

Question 54:

• JAMB 2021

If w varies inversely as $\frac{uv}{u+v}$ and w = 8 when

u = 2 and v = 6, find a relationship between u, v, w.

A. Uvw = 16(u + v)
B. 16uv = 3w(u + v)
C. Uvw = 12(u + v)
D. 12uvw = u + v