If 3 balloons cost $2.00, how much do 9 balloons cost?
2 answers:
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Here's the solution,
the volume of the given figure is :
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volume of pyramid :
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volume of pyramid = 40 cm³
now, volume of rectangular prism :
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volume of rectangular prism = 40 cm³
volume of composite figure = 40 + 40
=》80 cm³