a cone was developed from the sector of a circle with radius 10cm and an...

a cone was developed from the sector of a circle with radius 10cm and an angle at the centre of 180 degrees. What is the radius of the cone A. 9cm B. 8.5cm C. 4.3cm D. 3cm
pls show workings..?

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Asked by segipaul on 17th August, 2015

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