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A frustum of a pyramid is 3cm square at the top and 6cm square at the bottom and...



Discussion (3)

  • The formula for calculating the volume of frustum= V=1 / 3(a^2+ab+b^2)h
    a=3,b=6,h=5
    Sub everything inside the formula and it will give u 105

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  • Formula for the frustum of a pyramid=⅓h ( a² + ab + b² )
    Where a ( base ) = 6
    Where b ( top ) = 3 and the height, h = 5.
    ⅓ × 5 ( 6² + 6×3 + 3² ) = 105cm³.

  • Sarah

    The formular is
    V=h/3(A+A'+√AA'
    Where V is volume
    H is height
    A is area of upper base
    A' area of lower base
    Since the frsutum is a square
    The area of upper base is A^2
    Which is 3×3=9
    Area of the bottom also square is
    6×6=36
    Height =5cm (given)
    We have V =5/3(9+36+√(9×36)
    V=5/3(45+√324
    V=5/3(45 +18)
    V=5/3(63)
    V=315/3
    V=105cm^3