$\triangle ABC$ is similar to $\triangle PQR$. If ratio of perimeters of $\triangle ABC$ and $\triangle PQR$ is 3:7 and if PQ = 21 cm, then the length of AB (in cm) is?1). 62). 143). 94). 18

$\triangle ABC$ is similar to $\triangle PQR$. If ratio of perimeters

1.	$\triangle ABC$ is similar to $\triangle PQR$. If ratio of perimeters of $\triangle ABC$ and $\triangle PQR$ is 3:7 and if PQ = 21 cm, then the length of AB (in cm) is?1). 62). 143). 94). 18
Answer» This question was asked some where in previous YEAR papers of SSC, and CORRECT ANSWER was 14