How many paying stones, each measuring 2 1/2 m * 2 m are required to pave a rectangular court yard 30 m long and 16 1/2 m board?  Choose the correct choice from the following choices
A) 90	B) 99	C) 97	D) 95	E) 65
30 * 33/2 = 5/2 * 2 * x =&gt; x = 99   ANSWER 99
<result>B</result>
How many paying stones, each measuring 2 1/2 m * 2 m are required to pave a rectangular court yard 30 m long and 16 1/2 m board?