$triangle ABC$ is similar to $triangle PQR$. If ratio of perimeters of $triangle ABC$ and $triangle PQR$ is 37 and if PQ = 21 cm then the length of AB (in cm) is?1). 62). 143). 94). 18

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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

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$\triangle ABC$ 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