Two wire circles of diameters 12cm and 8cm are cut and then joined to make one large circle. Find the diameter of this larger circle.

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Guest Mar 26, 2015

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Best Answer

The circumference of the combined circles = 2pi [9 + 4 ] = 26pi cm

So

26 pi cm = 2 pi r divide by pi on both sides

26 cm = 2r = diameter of larger circle

CPhill Mar 26, 2015

CPhill · Answer 1 · 2015-03-26T09:29:34

The circumference of the combined circles = 2pi [9 + 4 ] = 26pi cm

So

26 pi cm = 2 pi r divide by pi on both sides

26 cm = 2r = diameter of larger circle