Answer: Option 'B' is correct.
Explanation:
Since we have given that
There is a prism having equilateral triangle as a base.
Height of prism = 29 yd
Length of base = 10 yd
As we know the formula for "Volume of prism"=Area of base × height
Here, Area of base = Area of equilateral triangle


Hence, Option 'B' is correct.