Question 15
VariationW 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
Show the answer and explanation
Answer: A (6/35)
Explanation
W = kU gives k = 5/3. Then U = W/k = 2/7 × 3/5 = 6/35.
W is directly proportional to U. If W = 5 when U = 3, find U when W = 2/7.
Answer: A (6/35)
W = kU gives k = 5/3. Then U = W/k = 2/7 × 3/5 = 6/35.