W is directly proportional to U. If W = 5 when U = 3, find U when W = \(\frac{2}{7}\)
A
\(\frac{6}{35}\)
B
\(\frac{10}{21}\)
C
\(\frac{21}{10}\)
D
\(\frac{35}{6}\)
Verified Correct Answer: A.
Step-by-Step Mathematical Solution
W \(\alpha\) U
W = ku
u = \(\frac{w}{k}\); \(\frac{2}{7}\) x \(\frac{3}{5}\)
= \(\frac{6}{35}\)
Source: WAEC / JAMB / NECO Classroom Archive (Record #29652)