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The volume of a conical tent is 154 cm3 and the area of its base is 38.5 cm2. What is the length (in cm) of canvas required to build the tent, if the canvas is 2 cm in width?
- A71.35
- B68.75
- C73.25
- D75.75
Answer not set
Discussion 1
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CCommunity
Radius of tent = r and area of its base is 38.5 cm2 = πr2
Then r = √(12.25) = 3.5
Also conical volume = 1/3 πr2h=154
h = 12 and l = 12.5
Curved surface area = πrl = 137.50 cm2
Curved surface area of conical tent = Area of canvas = length × width = 137.50 cm2
Length = 137.50/width = 137.37/2 = 68.75
Then r = √(12.25) = 3.5
Also conical volume = 1/3 πr2h=154
h = 12 and l = 12.5
Curved surface area = πrl = 137.50 cm2
Curved surface area of conical tent = Area of canvas = length × width = 137.50 cm2
Length = 137.50/width = 137.37/2 = 68.75