How many paying stones, each measuring 2 m * 1 m are required to pave a rectangular court yard 30 m long and 16 m board? Pick.
A) 240  B) 18  C) 26  D) 17  E) 12

Rationale: 30 * 16 = 2 * 1 * x = > x = 240 answer : a
Answer: A