A) 18000
B) 20000
C) 22000
D) 24000
Correct Answer: B
Solution :
Area of the room \[a-b=\sqrt{{{(23)}^{2}}-4\times 120}=7\] Area of the brick \[108\pi c{{m}^{2}}\] \[\frac{125\pi }{6}c{{m}^{2}}\] \[8\pi cm\] Number of bricks required \[\frac{1}{2}\]
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