Question: 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 ?
A) 90
B) 99
C) 97
D) 95
E) 65
Correct answer: b
Grade: 7 | Topic: Geometry | Difficulty: Medium | Standard: 7.G.B.6