How many paying stones, each measuring 2 m * 2 m are required to pave a rectangular court yard 30 m long and 18 m board?  Choose the correct choice from the following answers:  A) 99  B) 18  C) 135  D) 17  E) 12
30 * 18= 2* 2 * x =&gt; x   = 135   Answer: 135
<result>C</result>
How many paying stones, each measuring 2 m * 2 m are required to pave a rectangular court yard 30 m long and 18 m board?