Question

27. Two spheres one with radius 10 and one with radius 20, are tangent to each other. If P is any point on one sphere and Q is any point on the other sphere what is the maximum possible length of PQ?
A) 10
B) 20
C) 30
D) 60​

Answer 1

Answer:

maximum length is the farthest point from each other that is at the ends of the diameter

therefore

PQ=radius of the 2 spheres

=20+40

= 60

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