2009
Mathematics
JAMB
W is directly proportional to U. If W = 5 when U = 3, find U when W = 2/7
A.
6/35
B.
10/21
C.
21/10
D.
35/6
Correct Answer: 6/35
Explanation
W∝U. W=KU. K = W/U. K = 5/3. W = 5/3U. 2/7=5/3U. U = 2/7 × 3/5. U = 6/35
W∝U. W=KU. K = W/U. K = 5/3. W = 5/3U. 2/7=5/3U. U = 2/7 × 3/5. U = 6/35THIS WEEK's
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