Hor Kuok Theng's answer to Yos's Secondary 4 E Maths Singapore question.
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An alternate way to solve this question is to "Restore" the complete cylinder.
They have provided the volume of this cylindrical sector, and you have the angle of AOB.
Multiplying 2,000,000cm² by (360/135).
Dividing the result by 150cm (Height), you are left with the area of the base circle.
Just apply the Area of a Circle formula backwards and you can find the radius from there.
They have provided the volume of this cylindrical sector, and you have the angle of AOB.
Multiplying 2,000,000cm² by (360/135).
Dividing the result by 150cm (Height), you are left with the area of the base circle.
Just apply the Area of a Circle formula backwards and you can find the radius from there.
Date Posted:
4 years ago
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