Question

The cost of a rectangular glass piece is directly proportional to its length and inversely proportional to its width. If its length is increased by $40\%$, then by what percentage should its width be decreased so that its cost becomes twice?

• A. 25
• B. 30
• C. 24
• D. 20

Answer 1

Answer: (B)

30

Answer 2

The correct answer is (B),30