The area of a rectangular plot is 18 times its breadth. If the difference between the length and the breadth is 10 metres, what is its breadth? Choose the most appropriate option.
A) 10 metres  B) 8 metres  C) 7.5 metres  D) data inadequate  E) none of these

Rationale: "l × b = 18 × b ∴ l = 18 m and l – b = 10 ∴ b = 18 – 10 = 8 m answer b"
Answer: B