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The base of a pyramid is an equilateral triangle of side is 10m. If the height of the pyramid is `40 sqrt3` m, then the volume of the pyramid is :
एक पिरामिड का आधार 10 m भुजा वाला एक समबाह त्रिभुज है। यदि पिरामिड की ऊंचाई `40 sqrt3` मीटर है, तो पिरामिड का आयतन क्या है

A

`800 m^3`

B

`900 m^3`

C

`1000 m^3`

D

`1200 m^3`

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