exam Maths Puzzle Numerical Ability

The total surface area of a right circular cone is 108ח square feet. If the slant height of ther cone is twice the lenght of a radius of the base, find the lenght of a radiu

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The sum of 4 hours 17 minutes, 3 hours and 58 minutes, 45 minutes, and 7 hours and 12 minutes is? Find three consecutive integers such that the sum of the first and twice the third is one more than three times the second.