How many paying stones, each measuring 2 1/2 m * 2 m are required to pave a rectangular court yard 50 m long and 16 1/2 m board?	Choose the correct choice from the following choices: A) 99 B) 18 C) 165 D) 10 E) 15
50 * 33/2 = 5/2 * 2 * x =&gt; x   = 165   Answer:165
<result>C</result>
How many paying stones, each measuring 2 1/2 m * 2 m are required to pave a rectangular court yard 50 m long and 16 1/2 m board?