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 most appropriate option
A) 99 B) 88 C) 77 D) 65 E) 44
30 * 33/2 = 5/2 * 2 * x =&gt; x = 99   99nswer: 99
<result>A</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?