Back to Composite 3D figures — Problem 4 · Task Set 10

Composite 3D Figures

Grade 10·20 problems·~35 min·ACT Math·topic·act-geo-3d-composite

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Fluency Practice

$A hemisphere of radius 4 cm on top of a cylinder of radius 4 cm and height 10 cm, with exterior surfaces highlighted and the hidden contact areas at the joint shown in gray.$

A hemisphere of radius 4 cm sits on top of a cylinder of radius 4 cm and height 10 cm. What is the total exterior surface area?

$128\pi$ cm²

$160\pi$ cm²

$144\pi$ cm²

$112\pi$ cm²