Answer:
u = 6/35
Explanation:
w = k * u
w = ku
Where
k = constant of proportionality
if w=5 when u= 3
5 = k * 3
5 = 3k
k = 5/3
find u when w is =2/7
2/7 = 5/3 * U
2/7 = 5/3u
u = 2/7 ÷ 5/3
= 2/7 × 3/5
= (2*3)/(7*5)
= 6/35
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