Two men X and Y walk from P to Q a distance of 21 km at 3 and 4 km an – McqOptions

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1.	Two men X and Y walk from P to Q a distance of 21 km at 3 and 4 km an hour respectively. Y reaches Q returns immediately and meets X at R, the distance from P to R is
A.	18 km
B.	17 km
C.	16 km
D.	17.5 km
Answer» B. 17 km

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