Three solid spheres have their radii r1, r2 and r3. The spheres are me – McqOptions

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1.	Three solid spheres have their radii r1, r2 and r3. The spheres are melted to form a solid sphere of bigger radius. Then the radius of the new sphere is
A.	r1+r2+r3
B.	r12+r22+r3212
C.	r13+r23+r3313
D.	r14+r24+r3414
Answer» D. r14+r24+r3414

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