Question

If P-Q-R and d(P,Q)=2, d(P,R)=10, then find d(Q,R). Select the correct alternative answers of the question.
(A) 12
(B) 8
(C) √96
(D) 20

Answer 1

Solution :

Given , If P - Q - R and d( P,Q) = 2 ,

d( P,R ) = 10

<---•P-------•Q----------------------•R--->

d(P,Q) = 2 , d(P,R) = 10

d( Q,R) = d(P,R) - d( P,Q )

= 10 - 2

= 8

Therefore ,

d( Q,R ) = 8

Option ( B ) is correct.

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