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1 September, 12:09

A cylinder has a surface area of 150π inches2. What is its height if the radius is 5 inches? A) 5 inches B) 10 inches C) 5 π inches D) 10π inches

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  1. 1 September, 12:11
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    B is your answer. I took the test:p
  2. 1 September, 12:24
    0
    150π=10 π * X (the 10 is from 2*5 because you need diameter to find surface area and surface area is double the radius)

    15=X (150π:10π, π cancel out leaving with 150 : 10 which is 15)

    The height should be 15 inches
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