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Find the diameter of the circle whose area is equal to the sum of the areas of two circles having radii 4 cm and 3 cm.

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Area of circle = Area of circle of radius 4 cm + Area of circle of radius 3 cm

Area of circle = π(4)2 + π(3)2

πr2 = 16π + 9π

πr2 = 25π

r = 5

Radius of circle = 5 cm

Diameter of circle = 2r = 10 cm

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