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Answer : 3 6 m/h Explanation : Answer: C) 6 m/h Explanation: let, speed of Ali=X mph and Faizer=Y mphNow, relative speed when Ali is walking int the same direction with Faizer= (X-Y)mphhence, according to question, 27/(X-Y)=9 ; solving X-Y=3; --- (1)Now relative speed when walking in the opposite direction= (X Y) mphhence, according to question, 27/(X y)=3; solving X Y=9; --- (2)solving 1 and 2 we get X=6 and Y=3, where X is the speed of Ali.

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